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8256323: Remove HeapRegionManager::update_committed_space() #1219

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@@ -107,9 +107,6 @@ class HeapRegionManager: public CHeapObj<mtGC> {
// Pass down commit calls to the VirtualSpace.
void commit_regions(uint index, size_t num_regions = 1, WorkGang* pretouch_gang = NULL);

// Notify other data structures about change in the heap layout.
void update_committed_space(HeapWord* old_end, HeapWord* new_end);

// Find a contiguous set of empty or uncommitted regions of length num_regions and return
// the index of the first region or G1_NO_HRM_INDEX if the search was unsuccessful.
// Start and end defines the range to seek in, policy is first-fit.