Drop dict and Optional from argument type (#1160)

Fixes #1147.

Author: Majsvaffla

django-stubs/template/base.pyi

@@ -57,7 +57,7 @@ class Template:
         name: str | None = ...,
         engine: Engine | None = ...,
     ) -> None: ...
-    def render(self, context: Context | dict[str, Any] | None) -> SafeString: ...
+    def render(self, context: Context) -> SafeString: ...
     def compile_nodelist(self) -> NodeList: ...
     def get_exception_info(self, exception: Exception, token: Token) -> dict[str, Any]: ...