Remove unused tools/rfc.sh
Remove unused tools/rfc.sh

OpenStack now uses git-review from pip

Change-Id: Ib9e73f223478fe6df00011e385f767ff1a2d6bc2

savinash47/openstack-doc-tools,savinash47/openstack-doc-tools,openstack/openstack-doc-tools,openstack/openstack-doc-tools,savinash47/openstack-doc-tools