minor comments

- explains review concerns in #3158

scripts/ci/deploy_condition.sh

@@ -2,16 +2,13 @@
 
 set -e
 
-if [[ $TRAVIS_OS_NAME == "osx" && $TRAVIS_OSX_IMAGE != "xcode8.3" ]]; then
-    exit 1
-fi
-
 if [[ $TRAVIS_EVENT_TYPE = pull_request || $TRAVIS_EVENT_TPYE = cron ]]; then
     exit 2
 fi
 
-# ensure at least one positional arg exists
+# positional args are assumed to be file glob patterns to deploy
 if [[ ${#} -ge 1 ]]; then
+  # ensure at least one file exists
   [[ -n "$(ls $@ 2>/dev/null)" ]] || exit 3
 fi