CI: Only fetch in actions/checkout

.github/workflows/cygwin.yml

@@ -24,7 +24,7 @@ jobs:
       - uses: actions/checkout@v3
         with:
           submodules: recursive
-          fetch-depth: 3000
+          fetch-depth: 0
       - name: Install Cygwin
         uses: cygwin/cygwin-install-action@v2
         with:
@@ -39,22 +39,14 @@ jobs:
       - name: Set Windows PATH
         uses: egor-tensin/cleanup-path@v1
         with:
-          dirs: 'C:\tools\cygwin\lib\lapack;C:\tools\cygwin\bin'
-      - name: Remove OpenBLAS
-        # Added to work around OpenBLAS bugs on AVX-512
-        # Add libopenblas to the Cygwin install step when removing this step
-        # Should be possible after next Cygwin OpenBLAS update.
-        run: |
-          dash -c "/bin/rm -f /usr/bin/cygblas-0.dll"
+          dirs: 'C:\tools\cygwin\bin;C:\tools\cygwin\lib\lapack'
       - name: Verify that bash is Cygwin bash
         run: |
           command bash
           bash -c "uname -svrmo"
-      - name: Update with Cygwin git
-        # fetch-depth=0 above should make this short.
+      - name: Tell Cygwin's git about this repository.
         run: |
           dash -c "which git; /usr/bin/git config --system --add safe.directory /cygdrive/d/a/numpy/numpy"
-          dash -c "which git; /usr/bin/git fetch --all -p"
       - name: Verify python version
         # Make sure it's the Cygwin one, not a Windows one
         run: |