Update premerge.yml

The provide additional free space step fails. Subset of packages no longer installed with ubuntu-latest. Combining the apt-get remove into a single line to reduce the investigations required.

.github/workflows/premerge.yml

@@ -28,9 +28,7 @@ jobs:
         # Workaround to provide additional free space for builds.
         #   https://github.com/actions/virtual-environments/issues/2840
         sudo apt-get update -y
-        sudo apt-get remove -y '^dotnet-.*'
-        sudo apt-get remove -y 'php.*'
-        sudo apt-get remove -y azure-cli google-cloud-sdk google-chrome-stable firefox powershell mono-devel
+        sudo apt-get remove -y '^dotnet-.*' 'php.*' azure-cli google-cloud-sdk google-chrome-stable firefox powershell mono-devel
         sudo apt-get autoremove -y
         sudo apt-get clean
         sudo rm -rf "/usr/share/dotnet"