Revert "Test ASAN on Ubuntu 22.04 in nightly by increasing swap"

This reverts commit f7cef9a242.

This didn't work as intended, the builds are still failing for no obvious
reason.

.github/workflows/nightly.yml

@@ -60,18 +60,8 @@ jobs:
         zts: [true, false]
         include: ${{ fromJson(needs.GENERATE_MATRIX.outputs.matrix-include) }}
     name: "${{ matrix.branch.name }}_LINUX_X64${{ matrix.name }}_${{ matrix.debug && 'DEBUG' || 'RELEASE' }}_${{ matrix.zts && 'ZTS' || 'NTS' }}"
-    runs-on: ubuntu-${{ (matrix.branch.ref == 'PHP-8.3' || matrix.branch.ref == 'master') && '22.04' || '20.04' }}
+    runs-on: ubuntu-${{ ((matrix.branch.ref == 'PHP-8.3' || matrix.branch.ref == 'master') && !matrix.asan) && '22.04' || '20.04' }}
     steps:
-      # https://stackoverflow.com/a/76921482/1320374
-      - name: Increase swapfile
-        if: matrix.asan
-        run: |
-          sudo swapoff -a
-          sudo fallocate -l 8G /swapfile
-          sudo chmod 600 /swapfile
-          sudo mkswap /swapfile
-          sudo swapon /swapfile
-          sudo swapon --show
       - name: git checkout
         uses: actions/checkout@v4
         with: