Remove inplace argument for dask series renaming

See issue dask#8082

dask/dataframe/core.py

@@ -3168,7 +3168,7 @@ def __repr__(self):
             task=len(self.dask),
         )
 
-    def rename(self, index=None, inplace=False, sorted_index=False):
+    def rename(self, index=None, sorted_index=False):
         """Alter Series index labels or name
 
         Function / dict values must be unique (1-to-1). Labels not contained in
@@ -3183,8 +3183,6 @@ def rename(self, index=None, inplace=False, sorted_index=False):
             If dict-like or callable, the transformation is applied to the
             index. Scalar or hashable sequence-like will alter the
             ``Series.name`` attribute.
-        inplace : boolean, default False
-            Whether to return a new Series or modify this one inplace.
         sorted_index : bool, default False
             If true, the output ``Series`` will have known divisions inferred
             from the input series and the transformation. Ignored for
@@ -3212,7 +3210,7 @@ def rename(self, index=None, inplace=False, sorted_index=False):
             and not is_dict_like(index)
             and not isinstance(index, dd.Series)
         ):
-            res = self if inplace else self.copy()
+            res = self.copy()
             res.name = index
         else:
             res = self.map_partitions(M.rename, index, enforce_metadata=False)
@@ -3229,12 +3227,6 @@ def rename(self, index=None, inplace=False, sorted_index=False):
                     res.divisions = tuple(methods.tolist(new))
                 else:
                     res = res.clear_divisions()
-            if inplace:
-                self.dask = res.dask
-                self._name = res._name
-                self.divisions = res.divisions
-                self._meta = res._meta
-                res = self
         return res
 
     @derived_from(pd.Series)