toolchain: copy_toolchain_lib_root: remove unused variable LIBDIR

Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

toolchain/helpers.mk

@@ -17,7 +17,6 @@ copy_toolchain_lib_root = \
 		mkdir -p $(TARGET_DIR)/$${DESTDIR}; \
 		while true ; do \
 			LIBNAME=`basename $${LIBPATH}`; \
-			LIBDIR=`dirname $${LIBPATH}` ; \
 			LINKTARGET=`readlink $${LIBPATH}` ; \
 			rm -fr $(TARGET_DIR)/$${DESTDIR}/$${LIBNAME}; \
 			if test -h $${LIBPATH} ; then \