Remove outdated asserts.

Previously, the GcHeap structure was allocated, somewhat confusingly,
on the garbage collected heap.  Two asserts checked that the address
of the GcHeap structure, before being deallocated, was inside garbage
collected heap.  The GcHeap structure is now allocated on the malloc
heap and these assertions are no longer valid.

Change-Id: Ia031d116e94cf1e731315bb90077df8a82e41c55
1 file changed