Introduce some stricter typing

jedi/inference/context.py

@@ -1,7 +1,7 @@
 from abc import abstractmethod
 from contextlib import contextmanager
 from pathlib import Path
-from typing import Optional
+from typing import Optional, Any
 
 from parso.python.tree import Name
 
@@ -16,6 +16,8 @@ from jedi import parser_utils
 
 class AbstractContext:
     # Must be defined: inference_state and tree_node and parent_context as an attribute/property
+    tree_node: Any
+    parent_context: Any
 
     def __init__(self, inference_state):
         self.inference_state = inference_state
@@ -218,6 +220,13 @@ class ValueContext(AbstractContext):
 
 
 class TreeContextMixin:
+    tree_node: Any
+    is_module: Any
+    get_value: Any
+    inference_state: Any
+    is_class: Any
+    parent_context: Any
+
     def infer_node(self, node):
         from jedi.inference.syntax_tree import infer_node
         return infer_node(self, node)
@@ -300,7 +309,6 @@ class TreeContextMixin:
 class FunctionContext(TreeContextMixin, ValueContext):
     def get_filters(self, until_position=None, origin_scope=None):
         yield ParserTreeFilter(
-            self.inference_state,
             parent_context=self,
             until_position=until_position,
             origin_scope=origin_scope