net/http: remove unused named return variables
net/http: remove unused named return variables

The existing implementation names a c net.Conn return which is
never user. Leaving the returns unamed is marginally clearer.

Change-Id: If9a411c9235b78c116a8ffb21fef71f7a4a4ce8f
Reviewed-on: https://go-review.googlesource.com/66890
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>

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