[Go] Remove obsolete lang_requires_boot_languages setting

[Eric Botcazou]

Hi,

this gets rid of the "'c++' language required by 'go' in stage 1; enabling" 
obsolete message printed by the configure script.
Tested on x86_64-suse-linux, OK for the mainline?


2016-10-09  Eric Botcazou  <ebotca...@adacore.com>

        * config-lang.in (lang_requires_boot_languages): Delete.

-- 
Eric Botcazou
Index: config-lang.in
===================================================================
--- config-lang.in	(revision 240888)
+++ config-lang.in	(working copy)
@@ -31,10 +31,6 @@ compilers="go1\$(exeext)"
 target_libs="target-libgo target-libffi target-libbacktrace"
 lang_dirs="gotools"
 
-# The Go frontend is written in C++, so we need to build the C++
-# compiler during stage 1.
-lang_requires_boot_languages=c++
-
 gtfiles="\$(srcdir)/go/go-lang.c \$(srcdir)/go/go-c.h"
 
 # Do not build by default.