8315446: G1: Remove unused G1AllocRegion::attempt_allocation

Reviewed-by: iwalulya, tschatzl

Author: albertnetymk

src/hotspot/share/gc/g1/g1AllocRegion.hpp

@@ -151,10 +151,6 @@ class G1AllocRegion : public CHeapObj<mtGC> {
 
   // The following two are the building blocks for the allocation method.
 
-  // First-level allocation: Should be called without holding a
-  // lock. It will try to allocate lock-free out of the active region,
-  // or return null if it was unable to.
-  inline HeapWord* attempt_allocation(size_t word_size);
   // Perform an allocation out of the current allocation region, with the given
   // minimum and desired size. Returns the actual size allocated (between
   // minimum and desired size) in actual_word_size if the allocation has been

src/hotspot/share/gc/g1/g1AllocRegion.inline.hpp

@@ -63,11 +63,6 @@ inline HeapWord* G1AllocRegion::par_allocate(HeapRegion* alloc_region,
   return alloc_region->par_allocate(min_word_size, desired_word_size, actual_word_size);
 }
 
-inline HeapWord* G1AllocRegion::attempt_allocation(size_t word_size) {
-  size_t temp;
-  return attempt_allocation(word_size, word_size, &temp);
-}
-
 inline HeapWord* G1AllocRegion::attempt_allocation(size_t min_word_size,
                                                    size_t desired_word_size,
                                                    size_t* actual_word_size) {