net/http/httputil: remove redundant call of setBody in test
net/http/httputil: remove redundant call of setBody in test

Change-Id: I5a38200b9e050b484ec39f47c637e651e237390d
Reviewed-on: https://go-review.googlesource.com/82536
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>
Run-TryBot: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>

codestation/go,nawawi/go,CAFxX/go,CAFxX/go,cloudflare/go,codestation/go,nawawi/go,nawawi/go,josharian/go,josharian/go,josharian/go,cloudflare/go,Cofyc/go,CAFxX/go,nawawi/go,akutz/go,nawawi/go,codestation/go,cloudflare/go,codestation/go,Cofyc/go,nawawi/go,golang/go,CAFxX/go,golang/go,golang/go,golang/go,akutz/go,cloudflare/go,codestation/go,CAFxX/go,cloudflare/go,codestation/go,akutz/go,josharian/go,CAFxX/go,golang/go,golang/go,akutz/go,golang/go,akutz/go,cloudflare/go,josharian/go,akutz/go,Cofyc/go,cloudflare/go,nawawi/go,Cofyc/go,codestation/go,akutz/go,josharian/go,golang/go,Cofyc/go,codestation/go,christopher-henderson/Go,Cofyc/go,akutz/go,cloudflare/go,josharian/go,Cofyc/go,CAFxX/go,josharian/go,Cofyc/go,CAFxX/go,nawawi/go