HADOOP-16810. remove double quotes

Author: amahussein

start-build-env.sh

@@ -87,7 +87,7 @@ DOCKER_INTERACTIVE_RUN=${DOCKER_INTERACTIVE_RUN-"-i -t"}
 # within the container and use the result on your normal
 # system.  And this also is a significant speedup in subsequent
 # builds because the dependencies are downloaded only once.
-dockerargs=("--rm=true")
+dockerargs=(--rm=true)
 dockerargs+=($DOCKER_INTERACTIVE_RUN)
 # use urandom to increase entropy
 dockerargs+=(-v "/dev/urandom:/dev/random${V_OPTS:-}")
@@ -102,7 +102,5 @@ dockerargs+=(-w "${DOCKER_HOME_DIR}/hadoop")
 # set user
 dockerargs+=(-u "${USER_ID}")
 
-set -x
-
 docker run "${dockerargs[@]}" \
   "hadoop-build-${USER_ID}" "$@"