8277896: Remove unused BOTConstants member methods

Reviewed-by: kbarrett

Author: albertnetymk

src/hotspot/share/gc/shared/blockOffsetTable.hpp

@@ -67,17 +67,10 @@ class BOTConstants : public AllStatic {
   static size_t power_to_cards_back(uint i) {
     return (size_t)1 << (LogBase * i);
   }
-  static size_t power_to_words_back(uint i) {
-    return power_to_cards_back(i) * N_words;
-  }
   static size_t entry_to_cards_back(u_char entry) {
     assert(entry >= N_words, "Precondition");
     return power_to_cards_back(entry - N_words);
   }
-  static size_t entry_to_words_back(u_char entry) {
-    assert(entry >= N_words, "Precondition");
-    return power_to_words_back(entry - N_words);
-  }
 };
 
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