Remove RefResolver.scopes_stack_copy.

This makes the (anyhow-not-yet-working) dynamicRef validators
access private state on ref resolvers, but that will be fixed
when aforementioned not-working is fixed.

Author: Julian

jsonschema/_legacy_validators.py

@@ -207,10 +207,9 @@ def contains_draft6_draft7(validator, contains, instance, schema):
 
 
 def recursiveRef(validator, recursiveRef, instance, schema):
-    scope_stack = validator.resolver.scopes_stack_copy
     lookup_url, target = validator.resolver.resolution_scope, validator.schema
 
-    for each in reversed(scope_stack[1:]):
+    for each in reversed(validator.resolver._scopes_stack[1:]):
         lookup_url, next_target = validator.resolver.resolve(each)
         if next_target.get("$recursiveAnchor"):
             target = next_target

jsonschema/_validators.py

@@ -299,9 +299,8 @@ def ref(validator, ref, instance, schema):
 
 def dynamicRef(validator, dynamicRef, instance, schema):
     _, fragment = urldefrag(dynamicRef)
-    scope_stack = validator.resolver.scopes_stack_copy
 
-    for url in scope_stack:
+    for url in validator.resolver._scopes_stack:
         lookup_url = urljoin(url, dynamicRef)
         with validator.resolver.resolving(lookup_url) as subschema:
             if ("$dynamicAnchor" in subschema

jsonschema/validators.py

@@ -671,13 +671,6 @@ def resolution_scope(self):
         """
         return self._scopes_stack[-1]
 
-    @property
-    def scopes_stack_copy(self):
-        """
-        Retrieve a copy of the stack of resolution scopes.
-        """
-        return self._scopes_stack.copy()
-
     @property
     def base_uri(self):
         """