[NFC][libFuzzer] Remove unused GetModuleName helper in TracePC (#214032)

Fixing build bots after
https://github.com/llvm/llvm-project/pull/203084.

GitOrigin-RevId: 70253af8709617b860865ce8d74204718e8a1975

FuzzerTracePC.cpp

diff --git a/FuzzerTracePC.cpp b/FuzzerTracePC.cpp
index 7bd1a08..d439ec2 100644
--- a/FuzzerTracePC.cpp
+++ b/FuzzerTracePC.cpp
@@ -224,22 +224,11 @@
   return nullptr;
 }
 
-static std::string GetModuleName(uintptr_t PC) {
-  char ModulePathRaw[4096] = "";  // What's PATH_MAX in portable C++?
-  void *OffsetRaw = nullptr;
-  if (!EF->__sanitizer_get_module_and_offset_for_pc(
-      reinterpret_cast<void *>(PC), ModulePathRaw,
-      sizeof(ModulePathRaw), &OffsetRaw))
-    return "";
-  return ModulePathRaw;
-}
-
 template<class CallBack>
 void TracePC::IterateCoveredFunctions(CallBack CB) {
   for (size_t i = 0; i < NumPCTables; i++) {
     auto &M = ModulePCTable[i];
     assert(M.Start < M.Stop);
-    auto ModuleName = GetModuleName(M.Start->PC);
     for (auto NextFE = M.Start; NextFE < M.Stop; ) {
       auto FE = NextFE;
       assert(PcIsFuncEntry(FE) && "Not a function entry point");