Cleanup additional space and stop removing swap

There are 30GB+ of files in tools that we don't need or use
for building submariner, we mostly work inside of docker.
Those files are removed now.

Swap isn't disabled anymore, now GitHub uses a separate disk
for swap /dev/sdb instead of the main disk.

Signed-off-by: Miguel Angel Ajo <majopela@redhat.com>

Author: mangelajo

.github/workflows/e2e.yml

@@ -40,8 +40,8 @@ jobs:
 
       - name: Reclaim free space
         run: |
-          sudo swapoff -a
-          sudo rm -f /swapfile
+          # cleanup 30GB+ of tools we don't need for our CI
+          rm -rf /opt/ghc /usr/share/dotnet /usr/share/swift
           df -h
           free -h