CLN: remove redundant calls to ensure_index

Author: toobaz

pandas/core/frame.py

@@ -453,8 +453,6 @@ def _init_dict(self, data, index, columns, dtype=None):
                 # GH10856
                 # raise ValueError if only scalars in dict
                 index = extract_index(arrays[~missing])
-            else:
-                index = ensure_index(index)
 
             # no obvious "empty" int column
             if missing.any() and not is_integer_dtype(dtype):
@@ -7616,7 +7614,7 @@ def _arrays_to_mgr(arrays, arr_names, index, columns, dtype=None):
     arrays = _homogenize(arrays, index, dtype)
 
     # from BlockManager perspective
-    axes = [ensure_index(columns), ensure_index(index)]
+    axes = [ensure_index(columns), index]
 
     return create_block_manager_from_arrays(arrays, arr_names, axes)