I18n: remove operator categories from the translation files

Many messages were no longer needed since Blender 2.80.

Those messages appeared in the operator search menu and described what
category each operator belonged to. After Blender 2.80, this was
replaced by a place in the UI from where the operator can be called.

Pull Request: https://projects.blender.org/blender/blender/pulls/107700

scripts/modules/bl_i18n_utils/bl_extract_messages.py

@@ -384,7 +384,6 @@ def dump_rna_messages(msgs, reports, settings, verbose=False):
                 walk_keymap_hierarchy(lvl[3], msgsrc)
 
     # Dump Messages
-    operator_categories = {}
 
     def process_cls_list(cls_list):
         if not cls_list:
@@ -411,15 +410,6 @@ def dump_rna_messages(msgs, reports, settings, verbose=False):
                 bl_rna = bl_rna.base
             return cls_id
 
-        def operator_category(cls):
-            """Extract operators' categories, as displayed in 'search' space menu."""
-            # NOTE: keep in sync with C code in ui_searchbox_region_draw_cb__operator().
-            if issubclass(cls, bpy.types.OperatorProperties) and "_OT_" in cls.__name__:
-                cat_id = cls.__name__.split("_OT_")[0]
-                if cat_id not in operator_categories:
-                    cat_str = cat_id.capitalize() + ":"
-                    operator_categories[cat_id] = cat_str
-
         if verbose:
             print(cls_list)
         cls_list.sort(key=full_class_id)
@@ -431,7 +421,6 @@ def dump_rna_messages(msgs, reports, settings, verbose=False):
             if (cls in blacklist_rna_class) or issubclass(cls, bpy.types.Operator):
                 reports["rna_structs_skipped"].append(cls)
             else:
-                operator_category(cls)
                 walk_class(cls)
             # Recursively process subclasses.
             process_cls_list(cls.__subclasses__())
@@ -446,11 +435,6 @@ def dump_rna_messages(msgs, reports, settings, verbose=False):
     # Parse everything (recursively parsing from bpy_struct "class"...).
     process_cls_list(bpy.types.ID.__base__.__subclasses__())
 
-    # Finalize generated 'operator categories' messages.
-    for cat_str in operator_categories.values():
-        process_msg(msgs, bpy.app.translations.contexts.operator_default, cat_str, "Generated operator category",
-                    reports, check_ctxt_rna, settings)
-
     # Parse keymap preset preferences
     for preset_filename in sorted(
             os.listdir(os.path.join(settings.PRESETS_DIR, "keyconfig"))):