Remove CodeQL (#2380)

Summary:
Since a while ago, CodeQL is always emitting red signal, but the team
does not know what this is / how to fix this. At this point, it is
purely noise while not providing a valuable signal.

Ref https://github.com/pytorch/audio/issues/2314

Pull Request resolved: https://github.com/pytorch/audio/pull/2380

Reviewed By: carolineechen

Differential Revision: D36305599

Pulled By: mthrok

fbshipit-source-id: 27ece58730066543600f3873397b9a239e54beb0

.github/workflows/codeql.yml

-# GitHub Actions CodeQL Workflow
-
-name: CodeQL
-
-on:
-  pull_request:
-    branches: [ main ]
-
-  workflow_dispatch:
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v2
-
-      - name: Initialize CodeQL
-        uses: github/codeql-action/init@v1
-        with:
-          languages: python, cpp
-
-      - name: Install Torch
-        run: |
-              python -m pip install cmake ninja
-              python -m pip install --pre torch -f https://download.pytorch.org/whl/nightly/cpu/torch_nightly.html
-
-      - name: Build TorchAudio
-        run: USE_CUDA=0 python setup.py develop --user
-
-      # If any code scanning alerts are found, they will be under Security -> CodeQL
-      # Link: https://github.com/pytorch/audio/security/code-scanning
-      - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@v1