Update int.cloudbuild.yaml

Author: apeabody

build/int.cloudbuild.yaml

@@ -35,10 +35,7 @@ steps:
       cat _changed_folders
 
       # Do not prune if changing tests themselves
-      _INFRA_FOLDERS="build test .github"
       while read d; do
-        echo "${d%/}"
-        echo "$_INFRA_FOLDERS"
         if [[ "build test .github" =~ "${d%/}" ]]; then
           echo "Infrastructure folder ${d%/} has changed; no tests will be pruned."
           exit 0 # do not prune