enable full linter across the codebase (#9620)

enable linter using golangci-lint across
codebase to run a bunch of linters together,
we shall enable new linters as we fix more
things the codebase.

This PR fixes the first stage of this
cleanup.

cmd/config/notify/parse.go

@@ -36,7 +36,6 @@ import (
 
 const (
 	formatNamespace = "namespace"
-	formatAccess    = "access"
 )
 
 // ErrTargetsOffline - Indicates single/multiple target failures.