remove libmach

src/cmd/mkfile

diff --git a/src/cmd/mkfile b/src/cmd/mkfile
index 292c051..2b367c6 100644
--- a/src/cmd/mkfile
+++ b/src/cmd/mkfile
@@ -3,7 +3,7 @@
 
 TARG=`ls *.c | sed 's/\.c//'`
 LDFLAGS=$LDFLAGS
-SHORTLIB=mach sec fs mux regexp9 thread bio 9
+SHORTLIB=sec fs mux regexp9 thread bio 9
 
 <$PLAN9/src/mkmany