net/http: remove unused method needsSniff

Change-Id: Ia8c67d148fc7e71cac8954ccce6fffb8a6f423df
GitHub-Last-Rev: 9441b8f
GitHub-Pull-Request: golang#54036
Reviewed-on: https://go-review.googlesource.com/c/go/+/419322
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Javad Rajabzadeh <ja7ad@live.com>
Reviewed-by: hopehook <hopehook@qq.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Reviewed-by: Damien Neil <dneil@google.com>

src/net/http/response_test.go

@@ -972,19 +972,6 @@ func matchErr(err error, wantErr any) error {
 	return fmt.Errorf("%v; want %v", err, wantErr)
 }
 
-func TestNeedsSniff(t *testing.T) {
-	// needsSniff returns true with an empty response.
-	r := &response{}
-	if got, want := r.needsSniff(), true; got != want {
-		t.Errorf("needsSniff = %t; want %t", got, want)
-	}
-	// needsSniff returns false when Content-Type = nil.
-	r.handlerHeader = Header{"Content-Type": nil}
-	if got, want := r.needsSniff(), false; got != want {
-		t.Errorf("needsSniff empty Content-Type = %t; want %t", got, want)
-	}
-}
-
 // A response should only write out single Connection: close header. Tests #19499.
 func TestResponseWritesOnlySingleConnectionClose(t *testing.T) {
 	const connectionCloseHeader = "Connection: close"

src/net/http/server.go

@@ -555,12 +555,6 @@ func (w *response) requestTooLarge() {
 	}
 }
 
-// needsSniff reports whether a Content-Type still needs to be sniffed.
-func (w *response) needsSniff() bool {
-	_, haveType := w.handlerHeader["Content-Type"]
-	return !w.cw.wroteHeader && !haveType && w.written < sniffLen
-}
-
 // writerOnly hides an io.Writer value's optional ReadFrom method
 // from io.Copy.
 type writerOnly struct {