Remove deprecated masked_copy (pytorch#9819)

Summary:
No tests are affected by this removal.

Closes pytorch#1885 and closes pytorch#9817

While I was at it, I also fixed pytorch#9876 .
Pull Request resolved: pytorch#9819

Differential Revision: D9018126

Pulled By: SsnL

fbshipit-source-id: a9142bf4e2403bef05779a097f61fa8b7db04b71

Author: vishwakftw

docs/source/tensors.rst

@@ -224,6 +224,7 @@ view of a storage and defines numeric operations on it.
    .. automethod:: expand_as
    .. automethod:: exponential_
    .. automethod:: fill_
+   .. automethod:: flatten
    .. automethod:: flip
    .. automethod:: float
    .. automethod:: floor

docs/source/torch.rst

@@ -259,6 +259,7 @@ Other Operations
 .. autofunction:: diagflat
 .. autofunction:: diagonal
 .. autofunction:: einsum
+.. autofunction:: flatten
 .. autofunction:: flip
 .. autofunction:: histc
 .. autofunction:: meshgrid

torch/tensor.py

@@ -292,14 +292,6 @@ def scatter(self, dim, index, source):
     def scatter_add(self, dim, index, source):
         return self.clone().scatter_add_(dim, index, source)
 
-    def masked_copy(self, mask, tensor):
-        warnings.warn("masked_copy is deprecated and renamed to masked_scatter, and will be removed in v0.3")
-        return self.masked_scatter(mask, tensor)
-
-    def masked_copy_(self, mask, tensor):
-        warnings.warn("masked_copy_ is deprecated and renamed to masked_scatter_, and will be removed in v0.3")
-        return self.masked_scatter_(mask, tensor)
-
     def masked_scatter(self, mask, tensor):
         return self.clone().masked_scatter_(mask, tensor)