tests: disable apidiff check (#316)

internal/runtests.sh

@@ -71,9 +71,10 @@ echo "Ensuring that there are no dependencies not listed in ./internal/alldeps..
 
 # For pull requests, check if there are undeclared incompatible API changes.
 # Skip this if we're already going to fail since it is expensive.
-if ${result} -eq 0 ]] && [[ ! -z "${GITHUB_HEAD_REF:-x}" ]]; then
-  echo
-  ./internal/check_api_change.sh || result=1;
-fi
+# CURRENTLY BROKEN
+# if [[ ${result} -eq 0 ]] && [[ ! -z "${GITHUB_HEAD_REF:-x}" ]]; then
+  # echo
+  # ./internal/check_api_change.sh || result=1;
+# fi
 
 exit $result