[entropy.cache] drop EntropyCacher.CACHE_IDS['world_update']

lib/entropy/cache.py

@@ -40,7 +40,6 @@ class EntropyCacher(Singleton):
             'dep_tree': 'deptree/dep_tree_',
             'atom_match': 'atom_match/atom_match_',
             'atom_search': 'atom_search/atom_search_',
-            'world_update': 'world_update/world_cache_',
             'check_package_update': 'check_update/package_update_',
             'depends_tree': 'depends/depends_tree_',
             'filter_satisfied_deps': 'depfilter/filter_satisfied_deps_',

lib/entropy/client/interfaces/dep.py

@@ -3087,9 +3087,7 @@ class CalculatorsMixin:
 
         sha = hashlib.sha1()
         sha.update(const_convert_to_rawstring(cache_s))
-        cache_key = "%s%s" % (
-            EntropyCacher.CACHE_IDS['world_update'],
-            sha.hexdigest(),)
+        cache_key = "updates/%s_v1" % (sha.hexdigest(),)
 
         if use_cache and self.xcache:
             cached = self._cacher.pop(cache_key)

lib/entropy/client/interfaces/methods.py

@@ -341,8 +341,6 @@ class RepositoryMixin:
                 updated = False
             if updated:
                 self._cacher.discard()
-                EntropyCacher.clear_cache_item(
-                    EntropyCacher.CACHE_IDS['world_update'])
         return conn
 
     def add_repository(self, repository_metadata):
@@ -446,7 +444,7 @@ class RepositoryMixin:
         # also early remove from _enabled_repos to avoid
         # issues when reloading SystemSettings which is bound to
         # Entropy Client SystemSettings plugin, which
-        # triggers calculate_world_updates,
+        # triggers calculate_updates,
         # which triggers _all_repositories_hash, which triggers
         # open_repository, which triggers _load_repository,
         # which triggers an unwanted