Remove extra branch name variable

Author: Kristan Kenney

bin/v-update-sys-hestia-git

@@ -89,7 +89,6 @@ if [ ! -z "$1" ]; then
         echo "Error: invalid branch name specified."
         exit 1
     else
-        branch=$1
         /usr/local/hestia/bin/v-change-sys-config-value 'RELEASE_BRANCH' "$branch"
     fi
 else