Revert "Make GHA workflow to retrieve latest promote-able SHA from master (#79548)"

This reverts commit e479daed78b80179466c7233203c98a3fc0fc117.

Reverted https://github.com/pytorch/pytorch/pull/79548 on behalf of https://github.com/malfet due to Broke on trunk, see https://hud.pytorch.org/pytorch/pytorch/commit/e479daed78b80179466c7233203c98a3fc0fc117
diff --git a/.github/workflows/update-viablestrict.yml b/.github/workflows/update-viablestrict.yml
deleted file mode 100644
index eb41fae..0000000
--- a/.github/workflows/update-viablestrict.yml
+++ /dev/null
@@ -1,45 +0,0 @@
-name: Update viable/strict
-
-on:
-  schedule:
-    - cron: 17,47 * * * *
-  workflow_dispatch:
-
-concurrency:
-  group: ${{ github.workflow }}
-  cancel-in-progress: true
-
-jobs:
-  do_update_viablestrict:
-    runs-on: ubuntu-20.04
-    steps:
-      - name: Setup Python
-        uses: actions/setup-python@v2
-        with:
-          python-version: 3.8
-          architecture: x64
-
-      - name: Checkout PyTorch
-        uses: pytorch/pytorch/.github/actions/checkout-pytorch@master
-
-      - name: Install Python Packages
-        run: |
-          pip3 install rockset==0.8.10
-          pip3 install boto3==1.19.12
-          pip3 install six==1.16.0
-
-      - name: Get latest viable commit
-        env:
-          ROCKSET_API_KEY: ${{ secrets.ROCKSET_API_KEY }}
-        run: |
-          output=$(python3 -m .github/scripts/print_latest_commits.py)
-          echo "::set-output name=latest_viable_sha::$output"
-        id: get-latest-commit
-
-      - name: Push SHA to viable/strict branch
-        env:
-          GITHUB_TOKEN: ${{ secrets.MERGEBOT_TOKEN }}
-        run: |
-          git config --global user.email "pytorchmergebot@users.noreply.github.com"
-          git config --global user.name "PyTorch MergeBot"
-          echo "::debug::Set the latest sha variable to be ${{ steps.get-latest-commit.outputs.latest_viable_sha }}"