Fixes OpenAPI schema for Content create operations

The code[0] for special handling of FileFields when generating the OpenAPI schema was
introduced to work around a bug in drf-yasg[1]. This code was then ported when pulpcore
switched to using drf_spectacular for generating OpenAPI. This code is not needed. It
actually causes the OpenAPI schema for Content creation APIs to be different from all
other create operations.

[0] pulp@24b5071#diff-0535b5e0e76e73cdc44991f38a187114c123eb5ba125bda3015ca222a2b18088
[1] axnsan12/drf-yasg#386

closes pulp#2806

pulpcore/openapi/__init__.py

@@ -178,19 +178,6 @@ def _get_serializer_name(self, serializer, direction):
             name = name + "Response"
         return name
 
-    def map_parsers(self):
-        """
-        Get request parsers.
-
-        Handling cases with `FileField`.
-        """
-        parsers = super().map_parsers()
-        serializer = force_instance(self.get_request_serializer())
-        for field_name, field in getattr(serializer, "fields", {}).items():
-            if isinstance(field, serializers.FileField) and self.method in ("PUT", "PATCH", "POST"):
-                return ["multipart/form-data", "application/x-www-form-urlencoded"]
-        return parsers
-
     def _get_request_body(self):
         """Get request body."""
         request_body = super()._get_request_body()