Remove deprecated MergeDict class

scrapy/utils/datatypes.py

@@ -235,65 +235,6 @@ class CaselessDict(dict):
         return dict.pop(self, self.normkey(key), *args)
 
 
-class MergeDict(object):
-    """
-    A simple class for creating new "virtual" dictionaries that actually look
-    up values in more than one dictionary, passed in the constructor.
-
-    If a key appears in more than one of the given dictionaries, only the
-    first occurrence will be used.
-    """
-    def __init__(self, *dicts):
-        warnings.warn(
-            "scrapy.utils.datatypes.MergeDict is deprecated in favor "
-            "of collections.ChainMap (introduced in Python 3.3)",
-            category=ScrapyDeprecationWarning,
-            stacklevel=2,
-        )
-        self.dicts = dicts
-
-    def __getitem__(self, key):
-        for dict_ in self.dicts:
-            try:
-                return dict_[key]
-            except KeyError:
-                pass
-        raise KeyError
-
-    def __copy__(self):
-        return self.__class__(*self.dicts)
-
-    def get(self, key, default=None):
-        try:
-            return self[key]
-        except KeyError:
-            return default
-
-    def getlist(self, key):
-        for dict_ in self.dicts:
-            if key in dict_.keys():
-                return dict_.getlist(key)
-        return []
-
-    def items(self):
-        item_list = []
-        for dict_ in self.dicts:
-            item_list.extend(dict_.items())
-        return item_list
-
-    def has_key(self, key):
-        for dict_ in self.dicts:
-            if key in dict_:
-                return True
-        return False
-
-    __contains__ = has_key
-
-    def copy(self):
-        """Returns a copy of this object."""
-        return self.__copy__()
-
-
 class LocalCache(collections.OrderedDict):
     """Dictionary with a finite number of keys.