[BOLT][DWARF][NFC] Remove DWO ranges base (#99284)

Removes getters and setters for DWO ranges base due to it not being
used.

bolt/include/bolt/Rewrite/DWARFRewriter.h

@@ -95,9 +95,6 @@ private:
 
   std::mutex LocListDebugInfoPatchesMutex;
 
-  /// Dwo id specific its RangesBase.
-  std::unordered_map<uint64_t, uint64_t> DwoRangesBase;
-
   std::unordered_map<DWARFUnit *, uint64_t> LineTablePatchMap;
   std::unordered_map<const DWARFUnit *, uint64_t> TypeUnitRelocMap;
 
@@ -191,12 +188,6 @@ public:
   /// Update stmt_list for CUs based on the new .debug_line \p Layout.
   void updateLineTableOffsets(const MCAssembler &Asm);
 
-  uint64_t getDwoRangesBase(uint64_t DWOId) { return DwoRangesBase[DWOId]; }
-
-  void setDwoRangesBase(uint64_t DWOId, uint64_t RangesBase) {
-    DwoRangesBase[DWOId] = RangesBase;
-  }
-
   using OverriddenSectionsMap = std::unordered_map<DWARFSectionKind, StringRef>;
   /// Output .dwo files.
   void writeDWOFiles(DWARFUnit &, const OverriddenSectionsMap &,

bolt/lib/Rewrite/DWARFRewriter.cpp

@@ -719,7 +719,6 @@ void DWARFRewriter::updateDebugInfo() {
       } else {
         TempRangesSectionWriter = LegacyRangesWritersByCU[*DWOId].get();
         RangesBase = RangesSectionWriter->getSectionOffset();
-        setDwoRangesBase(*DWOId, *RangesBase);
       }
 
       updateUnitDebugInfo(*(*SplitCU), DWODIEBuilder, DebugLocDWoWriter,