Remove use of "DEBUG" env var from CLI and decouple DEBUG from --log-level

Signed-off-by: Doug Davis <dug@us.ibm.com>
Upstream-commit: 534ed8c2d4573e88fcb68b23341504f8949b34b5
Component: engine

components/engine/docker/docker.go

@@ -52,11 +52,8 @@ func main() {
 		setLogLevel(logrus.InfoLevel)
 	}
 
-	// -D, --debug, -l/--log-level=debug processing
-	// When/if -D is removed this block can be deleted
 	if *flDebug {
 		os.Setenv("DEBUG", "1")
-		setLogLevel(logrus.DebugLevel)
 	}
 
 	if len(flHosts) == 0 {