Remove unnecessary for loop in makeLabelPairs()
Remove unnecessary for loop in makeLabelPairs()

Fixes:
value.go:155:2: should replace loop with labelPairs = append(labelPairs, desc.constLabelPairs...) (S1011)

Signed-off-by: Karsten Weiss <723026db6760e47fc0f155c202cf765eda84bd51@gmail.com>

prometheus/client_golang,m3db/prometheus_client_golang