Don't build unneeded apps (missing 'memove()' with GCC 10)

diff --git a/user/Makefile.in b/user/Makefile.in
index 4b84e01..3b38c56 100644
--- a/user/Makefile.in
+++ b/user/Makefile.in
@@ -76,7 +76,7 @@ HEADER_FILES=	l4io.h \
 		l4/powerpc64/types.h \
 		l4/powerpc64/vregs.h
 
-SUBDIRS=	lib serv apps util contrib
+SUBDIRS=	lib serv util contrib
 
 pre-all:
 	@if test ! -e ./include; then \
