Simpler control for major collections

lgc.h

@@ -141,14 +141,6 @@
 #define LUAI_GCSTEPSIZE 8      /* 256 objects */
 
 
-/*
-** Check whether the declared GC mode is generational. While in
-** generational mode, the collector can go temporarily to incremental
-** mode to improve performance. This is signaled by 'g->lastatomic != 0'.
-*/
-#define isdecGCmodegen(g)	(g->gckind == KGC_GEN || g->lastatomic != 0)
-
-
 /*
 ** Control when GC is running:
 */