do not run clearlinux base update for plugin images

The plugin images are now golang:buster-1.16/distroless/debian based so
running update-clearlinux-base.sh for them is unnecessary.

GOLANG_BASE defaults to a fixed Go major.minor version so the base
image locking can be skipped.

Signed-off-by: Mikko Ylinen <[email protected]>

Author: mythi

Makefile

@@ -148,7 +148,6 @@ $(image_tags):
 push: $(image_tags)
 
 lock-images:
-	@scripts/update-clear-linux-base.sh clearlinux/golang:latest $(shell ls build/docker/*.Dockerfile)
 	@scripts/update-clear-linux-base.sh clearlinux:latest $(shell find demo -name Dockerfile)
 
 set-version: