remove Brew metadata; leave placeholder to sed-replace later

Change-Id: I981830c7d239d342ed14c1a819009711e6357fed
Signed-off-by: nickboldt <[email protected]>

rhel.Dockerfile

@@ -20,26 +20,9 @@ RUN adduser unprivilegeduser && \
     CGO_ENABLED=0 GOOS=linux go build -a -ldflags '-w -s' -a -installsuffix cgo -o che-machine-exec .
 
 FROM scratch
-ENV SUMMARY="Red Hat CodeReady Workspaces machine exec container" \
-    DESCRIPTION="Red Hat CodeReady Workspaces machine exec container" \
-    PRODNAME="codeready-workspaces" \
-    COMPNAME="machineexec-rhel8"
-LABEL summary="$SUMMARY" \
-      description="$DESCRIPTION" \
-      io.k8s.description="$DESCRIPTION" \
-      io.k8s.display-name="$DESCRIPTION" \
-      io.openshift.tags="$PRODNAME,$COMPNAME" \
-      com.redhat.component="$PRODNAME-$COMPNAME-container" \
-      name="$PRODNAME/$COMPNAME" \
-      version="2.0" \
-      license="EPLv2" \
-      maintainer="Nick Boldt <[email protected]>" \
-      io.openshift.expose-services="" \
-      usage=""
-
 COPY --from=builder /etc/passwd /etc/passwd
 COPY --from=builder /go/src/github.com/eclipse/che-machine-exec/che-machine-exec /go/bin/che-machine-exec
-
 USER unprivilegeduser
-
 ENTRYPOINT ["/go/bin/che-machine-exec"]
+
+# append Brew metadata here