remove unused variable

Author: sivan-shani

lld/ELF/InputFiles.h

@@ -239,7 +239,6 @@ class ELFFileBase : public InputFile {
 public:
   // Name of source file obtained from STT_FILE, if present.
   StringRef sourceFile;
-  std::unique_ptr<std::string> sourceFileStorage;
   uint32_t andFeatures = 0;
   bool hasCommonSyms = false;
   ArrayRef<uint8_t> aarch64PauthAbiCoreInfo;