move toplevel comment

Author: zhouselena

internal/cmd/perfcomp/main.go

@@ -4,11 +4,11 @@
 // not use this file except in compliance with the License. You may obtain
 // a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
 
-package main
-
 // This module cannot be included in the workspace since it requires a version of Gonum that is not compatible with the Go Driver.
 // Must use GOWORK=off to run this test.
 
+package main
+
 import (
 	"context"
 	"fmt"