Use "Delete" in FileSystemDock on all platforms

The consensus is that the per-platform strings are not so useful in the
first place, so it's better to revert back to "Delete" for every platform.

(cherry picked from commit 77daadac1dab5abcd705d13248acf73e0f81ae3d)

editor/filesystem_dock.cpp

@@ -2656,7 +2656,7 @@ FileSystemDock::FileSystemDock(EditorNode *p_editor) {
 	// `KEY_MASK_CMD | KEY_C` conflicts with other editor shortcuts.
 	ED_SHORTCUT("filesystem_dock/copy_path", TTR("Copy Path"), KEY_MASK_CMD | KEY_MASK_SHIFT | KEY_C);
 	ED_SHORTCUT("filesystem_dock/duplicate", TTR("Duplicate..."), KEY_MASK_CMD | KEY_D);
-	ED_SHORTCUT("filesystem_dock/delete", TTR("Move to Trash"), KEY_DELETE);
+	ED_SHORTCUT("filesystem_dock/delete", TTR("Delete"), KEY_DELETE);
 	ED_SHORTCUT("filesystem_dock/rename", TTR("Rename..."), KEY_F2);
 	ED_SHORTCUT("filesystem_dock/open_search", TTR("Focus the search box"), KEY_MASK_CMD | KEY_F);