Adjustments from Weidi's review

modules/caddyhttp/encode/encode.go

@@ -405,11 +405,6 @@ func (rw *responseWriter) ReadFrom(r io.Reader) (int64, error) {
 // Close writes any remaining buffered response and
 // deallocates any active resources.
 func (rw *responseWriter) Close() error {
-	if caddyhttp.ResponseWriterHijacked(rw.ResponseWriter) {
-		rw.releaseEncoder()
-		return nil
-	}
-
 	// didn't write, probably head request
 	if !rw.wroteHeader {
 		cl, err := strconv.Atoi(rw.Header().Get("Content-Length"))