Update buildah-oci-ta.

Author: tecarter94

deploy/tasks/buildah-oci-ta.yaml

@@ -439,7 +439,6 @@ spec:
 
         BUILDAH_ARGS=()
         UNSHARE_ARGS=()
-        use_domain_proxy=false
 
         if [ "${HERMETIC}" == "true" ]; then
           BUILDAH_ARGS+=("--pull=never")
@@ -450,7 +449,6 @@ spec:
           done
           echo "Build will be executed with network isolation"
           if [ "${ENABLE_DOMAIN_PROXY}" == "true" ]; then
-            use_domain_proxy=true
             echo "Build will be executed with domain proxy"
             /app/domain-proxy-server &
             server_pid=$!
@@ -606,7 +604,7 @@ spec:
         # disable host subcription manager integration
         find /usr/share/rhel/secrets -type l -exec unlink {} \;
 
-        if [ "$use_domain_proxy" == "true" ]; then
+        if [ "${ENABLE_DOMAIN_PROXY}" == "true" ]; then
           # Without expansion
           cat >> /app/build-script.sh << 'EOF'
         #!/bin/sh