gh-151365: Revert temporary Git downgrade (#156584)

Revert "gh-151365: Temporarily downgrade Git to prevent fatal error (#155495)"

This reverts commit 6d2b551.

Author: StanFromIreland

.github/workflows/reusable-check-html-ids.yml

@@ -20,13 +20,6 @@ jobs:
         with:
           persist-credentials: false
           ref: ${{ github.event.pull_request.head.sha }}
-      - name: 'Downgrade Git'
-        # Temporarily downgrade to 2.43 until 2.55 is in the runner image,
-        # to avoid "fatal: shallow file has changed since we read it" bug.
-        # See https://github.com/python/cpython/issues/151365.
-        run: |
-          sudo apt-get install -y --allow-downgrades 'git=1:2.43.*' 'git-man=1:2.43.*'
-          git --version
       - name: 'Find merge base'
         id: merge-base
         run: |

.github/workflows/reusable-context.yml

@@ -90,15 +90,6 @@ jobs:
             || ''
           }}
 
-    - name: 'Downgrade Git'
-      # Temporarily downgrade to 2.43 until 2.55 is in the runner image,
-      # to avoid "fatal: shallow file has changed since we read it" bug.
-      # See https://github.com/python/cpython/issues/151365.
-      if: github.event_name == 'pull_request'
-      run: |
-        sudo apt-get install -y --allow-downgrades 'git=1:2.43.*' 'git-man=1:2.43.*'
-        git --version
-
     # Adapted from https://github.com/actions/checkout/issues/520#issuecomment-1167205721
     - name: Fetch commits to get branch diff
       if: github.event_name == 'pull_request'

.github/workflows/reusable-docs.yml

@@ -47,14 +47,6 @@ jobs:
             && github.event.pull_request.head.sha
             || ''
           }}
-    - name: 'Downgrade Git'
-      # Temporarily downgrade to 2.43 until 2.55 is in the runner image,
-      # to avoid "fatal: shallow file has changed since we read it" bug.
-      # See https://github.com/python/cpython/issues/151365.
-      if: github.event_name == 'pull_request'
-      run: |
-        sudo apt-get install -y --allow-downgrades 'git=1:2.43.*' 'git-man=1:2.43.*'
-        git --version
     # Adapted from https://github.com/actions/checkout/issues/520#issuecomment-1167205721
     - name: 'Fetch commits to get branch diff'
       if: github.event_name == 'pull_request'