Remove LTS from README (#2844)

Summary:
Removing LTS mention and packages from README as it is discontinued.

Pull Request resolved: https://github.com/pytorch/audio/pull/2844

Reviewed By: hwangjeff, xiaohui-zhang

Differential Revision: D41200886

Pulled By: mthrok

fbshipit-source-id: 0da0afe68df51826075ce945cf0cf1de901e1c8f

README.md

@@ -35,7 +35,6 @@ The following are the corresponding ``torchaudio`` versions and supported Python
 | ----------- | ------------------------ | ------------------------ | ------------------------------- |
 | Development | ``master`` / ``nightly`` | ``main`` / ``nightly``   | ``>=3.7``, ``<=3.10``            |
 | Latest versioned release | ``1.13.0``               | ``0.13.0``               | ``>=3.7``, ``<=3.10``            |
-| LTS | ``1.8.2``               | ``0.8.2``               | ``>=3.6``, ``<=3.9``            |
 
 <details><summary>Previous versions</summary>
 
@@ -47,7 +46,7 @@ The following are the corresponding ``torchaudio`` versions and supported Python
 | ``1.10.0``               | ``0.10.0``               | ``>=3.6``, ``<=3.9``            |
 | ``1.9.1``                | ``0.9.1``                | ``>=3.6``, ``<=3.9``            |
 | ``1.9.0``                | ``0.9.0``                | ``>=3.6``, ``<=3.9``            |
-| ``1.8.2``                | ``0.8.2``                | ``>=3.6``, ``<=3.9``            |
+| ``1.8.1``                | ``0.8.1``                | ``>=3.6``, ``<=3.9``            |
 | ``1.8.0``                | ``0.8.0``                | ``>=3.6``, ``<=3.9``            |
 | ``1.7.1``                | ``0.7.2``                | ``>=3.6``, ``<=3.9``            |
 | ``1.7.0``                | ``0.7.0``                | ``>=3.6``, ``<=3.8``            |
@@ -68,8 +67,6 @@ Please refer to https://pytorch.org/get-started/locally/ for the details.
 
 **Note** Starting `0.10`, torchaudio has CPU-only and CUDA-enabled binary distributions, each of which requires a matching PyTorch version.
 
-**Note** <ins>LTS versions are distributed through a different channel than the other versioned releases. Please refer to the above page for details.</ins>
-
 **Note** This software was compiled against an unmodified copy of FFmpeg (licensed under [the LGPLv2.1](https://github.com/FFmpeg/FFmpeg/blob/a5d2008e2a2360d351798e9abe883d603e231442/COPYING.LGPLv2.1)), with the specific rpath removed so as to enable the use of system libraries. The LGPL source can be downloaded [here](https://github.com/FFmpeg/FFmpeg/releases/tag/n4.1.8).
 
 ### From Source