[FAB-15746] Delete pull_build_artifacts.sh
[FAB-15746] Delete pull_build_artifacts.sh

Given the maintenance required versus the benefit
of the pull_build_artifacts script, this script should
be removed. Users can simply issue the given make
directive to build the images locally.

Signed-off-by: Brett Logan <24e15547523ce4bb6c2ac877c9de72671df60332@ibm.com>
Change-Id: Id45804e42abda8c0f7e73b7199e2a123347022e0

binhn/fabric,jimthematrix/fabric,manish-sethi/fabric,binhn/fabric,muralisrini/fabric,manish-sethi/fabric-sidedb,manish-sethi/fabric-sidedb,manish-sethi/fabric-sidedb,hyperledger/fabric,hyperledger/fabric,manish-sethi/fabric-sidedb,manish-sethi/fabric,binhn/fabric,stemlending/fabric,stemlending/fabric,manish-sethi/fabric-sidedb,muralisrini/fabric,muralisrini/fabric,stemlending/fabric,jimthematrix/fabric,manish-sethi/fabric-sidedb,manish-sethi/fabric-sidedb,stemlending/fabric