remove @staticmethod decorators

There might have been a time when calling a static method was faster
than a regular method, but that is no longer the case. According to
micro-benchmarks, it is 70% slower in CPython 3.13 and it also makes
executing the code of a class definition slower.

gallery_dl/__init__.py

@@ -273,8 +273,7 @@ def main():
                 jobtype = job.UrlJob
                 jobtype.maxdepth = args.list_urls
                 if config.get(("output",), "fallback", True):
-                    jobtype.handle_url = \
-                        staticmethod(jobtype.handle_url_fallback)
+                    jobtype.handle_url = jobtype.handle_url_fallback
             elif args.dump_json:
                 jobtype = job.DataJob
                 jobtype.resolve = args.dump_json - 1
@@ -549,13 +548,11 @@ class InputManager():
                 "Unable to update '%s' (%s: %s)",
                 path, exc.__class__.__name__, exc)
 
-    @staticmethod
-    def _action_comment(lines, indicies):
+    def _action_comment(self, lines, indicies):
         for i in indicies:
             lines[i] = "# " + lines[i]
 
-    @staticmethod
-    def _action_delete(lines, indicies):
+    def _action_delete(self, lines, indicies):
         for i in indicies:
             lines[i] = ""