Core: Ensure classes match their header filename

Also drop some unused files.

Renamed:
- `core/dvector.h` -> `pool_vector.h`
- `core/io/resource_import.h` -> `resource_importer.h`
- `core/sort.h` -> `sort_array.h`
- `core/string_db.h` -> `string_name.h`

Dropped:
- `core/allocators.h`
- `core/os/shell.h`
- `core/variant_construct_string.cpp`

4 files changed, 4 insertions, 4 deletions

diff --git a/modules/gdnative/gdnative/array.cpp b/modules/gdnative/gdnative/array.cpp
index 18da9d811e..6849ff03d7 100644
--- a/modules/gdnative/gdnative/array.cpp
+++ b/modules/gdnative/gdnative/array.cpp
@@ -34,7 +34,7 @@
 #include "core/os/memory.h"
 
 #include "core/color.h"
-#include "core/dvector.h"
+#include "core/pool_vector.h"
 
 #include "core/variant.h"
 
diff --git a/modules/gdnative/gdnative/pool_arrays.cpp b/modules/gdnative/gdnative/pool_arrays.cpp
index 68e064d829..74c540ca14 100644
--- a/modules/gdnative/gdnative/pool_arrays.cpp
+++ b/modules/gdnative/gdnative/pool_arrays.cpp
@@ -31,7 +31,7 @@
 #include "gdnative/pool_arrays.h"
 
 #include "core/array.h"
-#include "core/dvector.h"
+#include "core/pool_vector.h"
 #include "core/variant.h"
 
 #include "core/color.h"
diff --git a/modules/gdnative/gdnative/string.cpp b/modules/gdnative/gdnative/string.cpp
index 4b8d79305c..913c57eb56 100644
--- a/modules/gdnative/gdnative/string.cpp
+++ b/modules/gdnative/gdnative/string.cpp
@@ -30,7 +30,7 @@
 
 #include "gdnative/string.h"
 
-#include "core/string_db.h"
+#include "core/string_name.h"
 #include "core/ustring.h"
 #include "core/variant.h"
 
diff --git a/modules/gdnative/gdnative/string_name.cpp b/modules/gdnative/gdnative/string_name.cpp
index d2862c5980..dcbb773c25 100644
--- a/modules/gdnative/gdnative/string_name.cpp
+++ b/modules/gdnative/gdnative/string_name.cpp
@@ -30,7 +30,7 @@
 
 #include "gdnative/string_name.h"
 
-#include "core/string_db.h"
+#include "core/string_name.h"
 #include "core/ustring.h"
 
 #include <string.h>