pkg/plugins/plugins.go: remove ineffective break statement.
pkg/plugins/plugins.go: remove ineffective break statement.

See,
$ gometalinter --vendor --deadline 10m --disable-all --enable=megacheck ./...
pkg/plugins/plugins.go:124:4:warning: ineffective break statement. Did you mean to break out of the outer loop? (SA4011) (megacheck)

grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana