[llvm-debuginfo-analyzer] Fix crash with WebAssembly dead code

#136772
Incorrect handling of 'tombstone' value for WebAssembly.

Address reviewes comments:
- Discard the changes done to 'LVRange.h'.

Author: CarlosAlbertoEnciso

llvm/include/llvm/DebugInfo/LogicalView/Core/LVRange.h

@@ -55,14 +55,11 @@ class LLVM_ABI LVRange final : public LVObject {
   LVAllocator Allocator;
   LVRangesTree RangesTree;
   LVRangeEntries RangeEntries;
-  std::optional<LVAddress> TombstoneAddress;
-  LVAddress Lower = 0;
+  LVAddress Lower = MaxAddress;
   LVAddress Upper = 0;
 
 public:
-  LVRange(std::optional<LVAddress> Address = std::nullopt)
-      : LVObject(), RangesTree(Allocator), TombstoneAddress(Address),
-        Lower(Address ? Address.value() : MaxAddress) {}
+  LVRange() : LVObject(), RangesTree(Allocator) {}
   LVRange(const LVRange &) = delete;
   LVRange &operator=(const LVRange &) = delete;
   ~LVRange() = default;
@@ -79,7 +76,7 @@ class LLVM_ABI LVRange final : public LVObject {
 
   void clear() {
     RangeEntries.clear();
-    Lower = TombstoneAddress ? TombstoneAddress.value() : MaxAddress;
+    Lower = MaxAddress;
     Upper = 0;
   }
   bool empty() const { return RangeEntries.empty(); }