Remove all unused and warn-raising methods from AbstractDataStore (#4310)

Author: alexamici

xarray/backends/common.py

@@ -1,8 +1,6 @@
 import logging
 import time
 import traceback
-import warnings
-from collections.abc import Mapping
 
 import numpy as np
 
@@ -74,18 +72,9 @@ def __array__(self, dtype=None):
         return np.asarray(self[key], dtype=dtype)
 
 
-class AbstractDataStore(Mapping):
+class AbstractDataStore:
     __slots__ = ()
 
-    def __iter__(self):
-        return iter(self.variables)
-
-    def __getitem__(self, key):
-        return self.variables[key]
-
-    def __len__(self):
-        return len(self.variables)
-
     def get_dimensions(self):  # pragma: no cover
         raise NotImplementedError()
 
@@ -125,38 +114,6 @@ def load(self):
         attributes = FrozenDict(self.get_attrs())
         return variables, attributes
 
-    @property
-    def variables(self):  # pragma: no cover
-        warnings.warn(
-            "The ``variables`` property has been deprecated and "
-            "will be removed in xarray v0.11.",
-            FutureWarning,
-            stacklevel=2,
-        )
-        variables, _ = self.load()
-        return variables
-
-    @property
-    def attrs(self):  # pragma: no cover
-        warnings.warn(
-            "The ``attrs`` property has been deprecated and "
-            "will be removed in xarray v0.11.",
-            FutureWarning,
-            stacklevel=2,
-        )
-        _, attrs = self.load()
-        return attrs
-
-    @property
-    def dimensions(self):  # pragma: no cover
-        warnings.warn(
-            "The ``dimensions`` property has been deprecated and "
-            "will be removed in xarray v0.11.",
-            FutureWarning,
-            stacklevel=2,
-        )
-        return self.get_dimensions()
-
     def close(self):
         pass