[ObjectYAML][NFC] Simplify ELFState<ELFT>::initProgramHeaders() (#123703)

This removes unused variables and dead code in the method.

Author: igorkudrin

llvm/lib/ObjectYAML/ELFEmitter.cpp

@@ -536,15 +536,11 @@ void ELFState<ELFT>::writeELFHeader(raw_ostream &OS) {
 
 template <class ELFT>
 void ELFState<ELFT>::initProgramHeaders(std::vector<Elf_Phdr> &PHeaders) {
-  DenseMap<StringRef, ELFYAML::Fill *> NameToFill;
   DenseMap<StringRef, size_t> NameToIndex;
   for (size_t I = 0, E = Doc.Chunks.size(); I != E; ++I) {
-    if (auto S = dyn_cast<ELFYAML::Fill>(Doc.Chunks[I].get()))
-      NameToFill[S->Name] = S;
     NameToIndex[Doc.Chunks[I]->Name] = I + 1;
   }
 
-  std::vector<ELFYAML::Section *> Sections = Doc.getSections();
   for (size_t I = 0, E = Doc.ProgramHeaders.size(); I != E; ++I) {
     ELFYAML::ProgramHeader &YamlPhdr = Doc.ProgramHeaders[I];
     Elf_Phdr Phdr;