diff --git a/handler/meter/meter.go b/handler/meter/meter.go
index 25a14de..996f8c0 100644
--- a/handler/meter/meter.go
+++ b/handler/meter/meter.go
@@ -16,7 +16,6 @@ import (
 )
 
 const (
-	contentTypeHeader     = "Content-Type"
 	contentEncodingHeader = "Content-Encoding"
 	acceptEncodingHeader  = "Accept-Encoding"
 )