[binutils-gdb] sim: Remove unused CXXFLAGS substitution

[Tsukasa OI]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=5bba7eaef514362db4fa43969160831ec9c677d4

commit 5bba7eaef514362db4fa43969160831ec9c677d4
Author: Tsukasa OI <research_trasio@irq.a4lg.com>
Date:   Mon Oct 10 09:24:48 2022 +0000

    sim: Remove unused CXXFLAGS substitution
    
    Not only that sim/configure.ac does not AC_SUBST CXXFLAGS,
    unless we need C++ compiler like CXX, substitution @CXXFLAGS@ is useless.
    Because of this, this commit removes this substitution.

Diff:
---
 sim/arch-subdir.mk.in | 1 -
 1 file changed, 1 deletion(-)

diff --git a/sim/arch-subdir.mk.in b/sim/arch-subdir.mk.in
index f6d8188d1a8..69a8e2f1e55 100644
--- a/sim/arch-subdir.mk.in
+++ b/sim/arch-subdir.mk.in
@@ -34,7 +34,6 @@ CC_FOR_BUILD = @CC_FOR_BUILD@
 CFLAGS_FOR_BUILD = @CFLAGS_FOR_BUILD@
 CFLAGS = @CFLAGS@
 CPPFLAGS = @CPPFLAGS@
-CXXFLAGS = @CXXFLAGS@
 LDFLAGS = @LDFLAGS@
 
 AR = @AR@