Remove unnecessary role initialization and lookup stuff

* Remove unnecessary copying of values from parents to role deps, as
  this can cause problems when roles have multiple parents (or the same
  parents with different params speficied through deps)
* Since we're already checking the dep chain in the block for role
  things (which every task in a role should have), it is not necessary
  to check the role directly in case it improperly grabs something

Fixes #14438

lib/ansible/playbook/block.py

@@ -269,9 +269,6 @@ class Block(Base, Become, Conditional, Taggable):
         if self._parent_block is not None:
             if not self._parent_block.evaluate_conditional(templar, all_vars):
                 return False
-        elif self._role is not None:
-            if not self._role.evaluate_conditional(templar, all_vars):
-                return False
         return super(Block, self).evaluate_conditional(templar, all_vars)
 
     def set_loader(self, loader):

lib/ansible/playbook/role/__init__.py

@@ -118,16 +118,6 @@ class Role(Base, Become, Conditional, Taggable):
             if role_include.role not in play.ROLE_CACHE:
                 play.ROLE_CACHE[role_include.role] = dict()
 
-            if parent_role:
-                if parent_role.when:
-                    new_when = parent_role.when[:]
-                    new_when.extend(r.when or [])
-                    r.when = new_when
-                if parent_role.tags:
-                    new_tags = parent_role.tags[:]
-                    new_tags.extend(r.tags or [])
-                    r.tags = new_tags
-
             play.ROLE_CACHE[role_include.role][hashed_params] = r
             return r