make first() an Optional, allow to specify QuerySet with one parameter (#136)

mypy_django_plugin/main.py

@@ -7,7 +7,7 @@ from mypy.errors import Errors
 from mypy.nodes import MypyFile, TypeInfo
 from mypy.options import Options
 from mypy.plugin import (
-    AnalyzeTypeContext, AttributeContext, ClassDefContext, FunctionContext, MethodContext, Plugin,
+    AttributeContext, ClassDefContext, FunctionContext, MethodContext, Plugin,
 )
 from mypy.types import Type as MypyType
 
@@ -233,15 +233,6 @@ class NewSemanalDjangoPlugin(Plugin):
             return partial(request.set_auth_user_model_as_type_for_request_user, django_context=self.django_context)
         return None
 
-    def get_type_analyze_hook(self, fullname: str
-                              ) -> Optional[Callable[[AnalyzeTypeContext], MypyType]]:
-        info = self._get_typeinfo_or_none(fullname)
-        if (info
-                and info.has_base(fullnames.QUERYSET_CLASS_FULLNAME)
-                and not info.has_base(fullnames.BASE_MANAGER_CLASS_FULLNAME)):
-            return partial(querysets.set_first_generic_param_as_default_for_second, fullname=fullname)
-        return None
-
 
 def plugin(version):
     return NewSemanalDjangoPlugin