cmd/go: don't print phdrs running "go version" on ELF files

I assume this was for debugging purposes.

Updates #31624

Change-Id: Ie158fde0574c9bbbd9d1b684f51af5681974aff7
Reviewed-on: https://go-review.googlesource.com/c/go/+/175449
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>

src/cmd/go/internal/version/exe.go

@@ -86,7 +86,6 @@ func (x *elfExe) Close() error {
 
 func (x *elfExe) ReadData(addr, size uint64) ([]byte, error) {
 	for _, prog := range x.f.Progs {
-		fmt.Printf("%#x %#x %#x\n", addr, prog.Vaddr, prog.Vaddr+prog.Filesz)
 		if prog.Vaddr <= addr && addr <= prog.Vaddr+prog.Filesz-1 {
 			n := prog.Vaddr + prog.Filesz - addr
 			if n > size {