net/http/httputil: remove redundant pw.Close() call in DumpRequestOut

pw.Close() is already deferred earlier in DumpRequestOut.

Change-Id: Icdc9366c816848ed0bb444022d2aa14e4ceaabac
GitHub-Last-Rev: 7c38f9f
GitHub-Pull-Request: golang#75029
Reviewed-on: https://go-review.googlesource.com/c/go/+/696415
Reviewed-by: Cherry Mui <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>
Reviewed-by: Damien Neil <[email protected]>
Reviewed-by: Sean Liao <[email protected]>
Auto-Submit: Sean Liao <[email protected]>

Author: 1911860538

src/net/http/httputil/dump.go

@@ -147,7 +147,6 @@ func DumpRequestOut(req *http.Request, body bool) ([]byte, error) {
 
 	req.Body = save
 	if err != nil {
-		pw.Close()
 		dr.err = err
 		close(quitReadCh)
 		return nil, err