[docs] Remove `input` parameter from `Tensor.flatten` docs (#63180)

Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/63180

**Summary**
This commit removes the `input` parameter from the signature for
`Tensor.flatten` shown in its documentation. This parameter is accepted
by `torch.flatten` but not `Tensor.flatten` (since the input is the
`Tensor` on which `flatten` is invoked).

**Test Plan**
Continuous integration.

**Fixes**
This commit fixes #57478.

Test Plan: Imported from OSS

Reviewed By: VitalyFedyunin

Differential Revision: D30293156

Pulled By: SplitInfinity

fbshipit-source-id: 4ad70d638af009fb6bdeb703433b306904d39a76

diff --git a/torch/_tensor_docs.py b/torch/_tensor_docs.py
index fd6521b..eb8d4ec 100644 (file)
--- a/torch/_tensor_docs.py
+++ b/torch/_tensor_docs.py
@@ -1513,9 +1513,9 @@ See :func:`torch.frexp`
 
 add_docstr_all('flatten',
                r"""
-flatten(input, start_dim=0, end_dim=-1) -> Tensor
+flatten(start_dim=0, end_dim=-1) -> Tensor
 
-see :func:`torch.flatten`
+See :func:`torch.flatten`
 """)
 
 add_docstr_all('gather',