removes comment

create.sh

   --user=${DB_USER} \
   --password=${DB_USER_PASSWORD} \
   --silent"
-# [: mysqld: unexpected operator when not using [
-# see: https://unix.stackexchange.com/a/482059
-#while [ ! $(docker exec ${DOCKER_PREFIX}-web /bin/sh -c "${PING_MYSQL}") ]
 while ! docker exec ${DOCKER_PREFIX}-web /bin/sh -c "${PING_MYSQL}"
 do
     echo Waiting for ${DOCKER_PREFIX}-db to accept connections…