IMPALA-4648: remove build_thirdparty.sh
IMPALA-4648: remove build_thirdparty.sh

It is not needed by any build processes.

Change-Id: I36e11384877e5115430baf0170b31a508cb01ba3
Reviewed-on: http://gerrit.cloudera.org:8080/5477
Reviewed-by: Tim Armstrong <2f8e34250f03a653da3dc27f7ec203eafdde80fc@cloudera.com>
Tested-by: Impala Public Jenkins

cloudera/Impala,michaelhkw/incubator-impala,cloudera/Impala,michaelhkw/incubator-impala,michaelhkw/incubator-impala,michaelhkw/incubator-impala,cloudera/Impala,cloudera/Impala,michaelhkw/incubator-impala,michaelhkw/incubator-impala,cloudera/Impala,cloudera/Impala,michaelhkw/incubator-impala,cloudera/Impala