gopls/internal/lsp/cache: remove stray print statement

A stray print statement was accidentally left in CL 441877. Remove it.

Change-Id: I44e4408059f30d35ad8c84b070aea3e197762d1c
Reviewed-on: https://go-review.googlesource.com/c/tools/+/442782
gopls-CI: kokoro <[email protected]>
Auto-Submit: Robert Findley <[email protected]>
Reviewed-by: Alan Donovan <[email protected]>
Run-TryBot: Robert Findley <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>

Author: findleyr

gopls/internal/lsp/cache/standalone_go116.go

@@ -8,7 +8,6 @@
 package cache
 
 import (
-	"fmt"
 	"go/build/constraint"
 	"go/parser"
 	"go/token"
@@ -35,7 +34,6 @@ func isStandaloneFile(src []byte, standaloneTags []string) bool {
 			continue
 		}
 		for _, comment := range cg.List {
-			fmt.Println(comment.Text)
 			if c, err := constraint.Parse(comment.Text); err == nil {
 				if tag, ok := c.(*constraint.TagExpr); ok {
 					for _, t := range standaloneTags {