Remove redundant "#ifndef NDEBUG" guarding asserts.

Change-Id: Iaa4687cbaaa1eac59cf0b80afb57b3ba708ece09
diff --git a/vm/alloc/HeapBitmap.h b/vm/alloc/HeapBitmap.h
index 931bdca..2a4fe2c 100644
--- a/vm/alloc/HeapBitmap.h
+++ b/vm/alloc/HeapBitmap.h
@@ -158,11 +158,9 @@
     const size_t index = HB_OFFSET_TO_INDEX(offset);
     const unsigned long mask = HB_OFFSET_TO_MASK(offset);
 
-#ifndef NDEBUG
     assert(hb->bits != NULL);
     assert((uintptr_t)obj >= hb->base);
     assert(index < hb->bitsLen / sizeof(*hb->bits));
-#endif
 
     if (setBit) {
         if ((uintptr_t)obj > hb->max) {