ci: keep bb installation to minimal

Author: alejoamiras

.github/workflows/ci.yml

@@ -117,8 +117,6 @@ jobs:
           mkdir -p $HOME/.bb
           curl -L -o $HOME/.bb/bbup_installer https://raw.githubusercontent.com/AztecProtocol/aztec-packages/master/barretenberg/bbup/install
           echo "Installer downloaded..."
-          chmod +x $HOME/.bb/bbup_installer
-          echo "Installer made executable..."
           bash $HOME/.bb/bbup_installer
           echo "bbup installed..."
           echo "${HOME}/.bb" >> $GITHUB_PATH