[m-rev.] [Testing]: Don't test reg.gc on x86.

[Peter Wang]

conf.i686:
    The reg.gc grade doesn't work on x86 with gcc 9+,
    no point testing it until it is fixed.

diff --git a/conf.i686 b/conf.i686
index 8c56e8e..8149bfe 100644
--- a/conf.i686
+++ b/conf.i686
@@ -2,7 +2,7 @@
 
 CONFIGURE_OPTS="--build=i686-linux-gnu --host=i686-linux-gnu"
 INSTALL_LIBGRADES=
-TEST_GRADES="hlc.par.gc reg.gc csharp java"
+TEST_GRADES="hlc.par.gc csharp java"
 
 pre_bootcheck() {
     case "$GRADE" in
-- 
2.37.1