Delete TAB only line

[Masato Asou]

ok?

Index: etc/rc
===================================================================
RCS file: /cvs/src/etc/rc,v
retrieving revision 1.569
diff -u -p -r1.569 rc
--- etc/rc      18 Jan 2023 20:44:40 -0000      1.569
+++ etc/rc      25 Jan 2023 09:32:59 -0000
@@ -251,7 +251,7 @@ reorder_libs() {
                fi
                ) || { _error=true; break; }
        done
-               
+
        rm -rf $_relink/_rebuild.*
 
        # Restore previous mount state if it was changed.