Delete flaky DCHECK

Fixes mips build

Change-Id: I738b41f09f3c926f21640e358cf0bd5557167b0e
diff --git a/runtime/mem_map.cc b/runtime/mem_map.cc
index 9fef544..4b2ac20 100644
--- a/runtime/mem_map.cc
+++ b/runtime/mem_map.cc
@@ -744,9 +744,6 @@
                           off_t offset,
                           bool low_4gb) {
 #ifdef __LP64__
-#ifndef __APPLE__
-  DCHECK_EQ(flags & MAP_32BIT, 0);
-#endif
   // When requesting low_4g memory and having an expectation, the requested range should fit into
   // 4GB.
   if (low_4gb && (