[klibc] arm: remove unused variable 

MCONFIG containing a no longer recognised gcc flag.

Signed-off-by: Thorsten Glaser <tg@mirbsd.org>
Signed-off-by: maximilian attems <max@stro.at>
diff --git a/usr/klibc/arch/sh/MCONFIG b/usr/klibc/arch/sh/MCONFIG
index ba90850..665abb2 100644
--- a/usr/klibc/arch/sh/MCONFIG
+++ b/usr/klibc/arch/sh/MCONFIG
@@ -7,7 +7,6 @@
 # accordingly.
 #
 
-ARCHREGFLAGS = -m4 -mno-implicit-fp
 KLIBCOPTFLAGS     += -Os -fomit-frame-pointer
 KLIBCBITSIZE      = 32