exp: we don't need -ly

Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/configure b/configure
index 1a456ff..21b8739 100755
--- a/configure
+++ b/configure
@@ -1287,8 +1287,8 @@
 }
 EOF
 
-if compile_prog "" "-ll -ly" "lex"; then
-  LIBS="-ll -ly $LIBS"
+if compile_prog "" "-ll" "lex"; then
+  LIBS="-ll $LIBS"
 else
   arith="no"
 fi