Remove VisualScript module for 4.0

As announced in https://godotengine.org/article/godot-4-will-discontinue-visual-scripting,
Godot maintainers have agreed to discontinue the current implementation of
our VisualScript language.

The way it had been designed was not user-friendly enough and we did not
succeed in improving its usability to actually make it a good low-code
solution for users who need one.

So we prefer to remove it for Godot 4.0 and leave the door open for new,
innovative ideas around visual scripting, to be developed as plugins or
extensions now that Godot provides sufficient functionality for this
(notably via GDExtension and the godot-cpp C++ bindings).

The current module has been moved to a dedicated repository (with full Git
history extracted with `git filter-branch`):

https://github.com/godotengine/godot-visual-script

It can still be compiled as a C++ module (for now, but will likely require
work to be kept in sync with the engine repository), but our hope is that
contributors will port it to GDExtension (which is quite compatibile with
the existing C++ module code when using the godot-cpp C++ bindings).

1 files changed, 0 insertions, 166 deletions

diff --git a/modules/visual_script/doc_classes/VisualScriptCustomNode.xml b/modules/visual_script/doc_classes/VisualScriptCustomNode.xml
deleted file mode 100644
index 6e522b2f84..0000000000
--- a/modules/visual_script/doc_classes/VisualScriptCustomNode.xml
+++ /dev/null
@@ -1,166 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" ?>
-<class name="VisualScriptCustomNode" inherits="VisualScriptNode" version="4.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../../../doc/class.xsd">
-	<brief_description>
-		A scripted Visual Script node.
-	</brief_description>
-	<description>
-		A custom Visual Script node which can be scripted in powerful ways.
-	</description>
-	<tutorials>
-	</tutorials>
-	<methods>
-		<method name="_get_caption" qualifiers="virtual const">
-			<return type="String" />
-			<description>
-				Returns the node's title.
-			</description>
-		</method>
-		<method name="_get_category" qualifiers="virtual const">
-			<return type="String" />
-			<description>
-				Returns the node's category.
-			</description>
-		</method>
-		<method name="_get_input_value_port_count" qualifiers="virtual const">
-			<return type="int" />
-			<description>
-				Returns the count of input value ports.
-			</description>
-		</method>
-		<method name="_get_input_value_port_hint" qualifiers="virtual const">
-			<return type="int" />
-			<param index="0" name="input_idx" type="int" />
-			<description>
-				Returns the specified input port's hint. See the [enum @GlobalScope.PropertyHint] hints.
-			</description>
-		</method>
-		<method name="_get_input_value_port_hint_string" qualifiers="virtual const">
-			<return type="String" />
-			<param index="0" name="input_idx" type="int" />
-			<description>
-				Returns the specified input port's hint string.
-			</description>
-		</method>
-		<method name="_get_input_value_port_name" qualifiers="virtual const">
-			<return type="String" />
-			<param index="0" name="input_idx" type="int" />
-			<description>
-				Returns the specified input port's name.
-			</description>
-		</method>
-		<method name="_get_input_value_port_type" qualifiers="virtual const">
-			<return type="int" />
-			<param index="0" name="input_idx" type="int" />
-			<description>
-				Returns the specified input port's type. See the [enum Variant.Type] values.
-			</description>
-		</method>
-		<method name="_get_output_sequence_port_count" qualifiers="virtual const">
-			<return type="int" />
-			<description>
-				Returns the amount of output [b]sequence[/b] ports.
-			</description>
-		</method>
-		<method name="_get_output_sequence_port_text" qualifiers="virtual const">
-			<return type="String" />
-			<param index="0" name="seq_idx" type="int" />
-			<description>
-				Returns the specified [b]sequence[/b] output's name.
-			</description>
-		</method>
-		<method name="_get_output_value_port_count" qualifiers="virtual const">
-			<return type="int" />
-			<description>
-				Returns the amount of output value ports.
-			</description>
-		</method>
-		<method name="_get_output_value_port_hint" qualifiers="virtual const">
-			<return type="int" />
-			<param index="0" name="output_idx" type="int" />
-			<description>
-				Returns the specified output port's hint. See the [enum @GlobalScope.PropertyHint] hints.
-			</description>
-		</method>
-		<method name="_get_output_value_port_hint_string" qualifiers="virtual const">
-			<return type="String" />
-			<param index="0" name="output_idx" type="int" />
-			<description>
-				Returns the specified output port's hint string.
-			</description>
-		</method>
-		<method name="_get_output_value_port_name" qualifiers="virtual const">
-			<return type="String" />
-			<param index="0" name="output_idx" type="int" />
-			<description>
-				Returns the specified output port's name.
-			</description>
-		</method>
-		<method name="_get_output_value_port_type" qualifiers="virtual const">
-			<return type="int" />
-			<param index="0" name="output_idx" type="int" />
-			<description>
-				Returns the specified output port's type. See the [enum Variant.Type] values.
-			</description>
-		</method>
-		<method name="_get_text" qualifiers="virtual const">
-			<return type="String" />
-			<description>
-				Returns the custom node's text, which is shown right next to the input [b]sequence[/b] port (if there is none, on the place that is usually taken by it).
-			</description>
-		</method>
-		<method name="_get_working_memory_size" qualifiers="virtual const">
-			<return type="int" />
-			<description>
-				Returns the size of the custom node's working memory. See [method _step] for more details.
-			</description>
-		</method>
-		<method name="_has_input_sequence_port" qualifiers="virtual const">
-			<return type="bool" />
-			<description>
-				Returns whether the custom node has an input [b]sequence[/b] port.
-			</description>
-		</method>
-		<method name="_step" qualifiers="virtual const">
-			<return type="Variant" />
-			<param index="0" name="inputs" type="Array" />
-			<param index="1" name="outputs" type="Array" />
-			<param index="2" name="start_mode" type="int" />
-			<param index="3" name="working_mem" type="Array" />
-			<description>
-				Execute the custom node's logic, returning the index of the output sequence port to use or a [String] when there is an error.
-				The [code]inputs[/code] array contains the values of the input ports.
-				[code]outputs[/code] is an array whose indices should be set to the respective outputs.
-				The [code]start_mode[/code] is usually [constant START_MODE_BEGIN_SEQUENCE], unless you have used the [code]STEP_*[/code] constants.
-				[code]working_mem[/code] is an array which can be used to persist information between runs of the custom node. The size needs to be predefined using [method _get_working_memory_size].
-				When returning, you can mask the returned value with one of the [code]STEP_*[/code] constants.
-			</description>
-		</method>
-	</methods>
-	<constants>
-		<constant name="START_MODE_BEGIN_SEQUENCE" value="0" enum="StartMode">
-			The start mode used the first time when [method _step] is called.
-		</constant>
-		<constant name="START_MODE_CONTINUE_SEQUENCE" value="1" enum="StartMode">
-			The start mode used when [method _step] is called after coming back from a [constant STEP_PUSH_STACK_BIT].
-		</constant>
-		<constant name="START_MODE_RESUME_YIELD" value="2" enum="StartMode">
-			The start mode used when [method _step] is called after resuming from [constant STEP_YIELD_BIT].
-		</constant>
-		<constant name="STEP_PUSH_STACK_BIT" value="16777216">
-			Hint used by [method _step] to tell that control should return to it when there is no other node left to execute.
-			This is used by [VisualScriptCondition] to redirect the sequence to the "Done" port after the [code]true[/code]/[code]false[/code] branch has finished execution.
-		</constant>
-		<constant name="STEP_GO_BACK_BIT" value="33554432">
-			Hint used by [method _step] to tell that control should return back, either hitting a previous [constant STEP_PUSH_STACK_BIT] or exiting the function.
-		</constant>
-		<constant name="STEP_NO_ADVANCE_BIT" value="67108864">
-		</constant>
-		<constant name="STEP_EXIT_FUNCTION_BIT" value="134217728">
-			Hint used by [method _step] to tell that control should stop and exit the function.
-		</constant>
-		<constant name="STEP_YIELD_BIT" value="268435456">
-			Hint used by [method _step] to tell that the function should be yielded.
-			Using this requires you to have at least one working memory slot, which is used for the [VisualScriptFunctionState].
-		</constant>
-	</constants>
-</class>