[ELF] Remove unused InputSection::getOffsetInFile

Author: MaskRay

lld/ELF/InputSection.cpp

@@ -153,12 +153,6 @@ void InputSectionBase::uncompress() const {
   uncompressedSize = -1;
 }
 
-uint64_t InputSectionBase::getOffsetInFile() const {
-  const uint8_t *fileStart = (const uint8_t *)file->mb.getBufferStart();
-  const uint8_t *secStart = data().begin();
-  return secStart - fileStart;
-}
-
 template <class ELFT> RelsOrRelas<ELFT> InputSectionBase::relsOrRelas() const {
   if (relSecIdx == 0)
     return {};

lld/ELF/InputSection.h

@@ -156,8 +156,6 @@ class InputSectionBase : public SectionBase {
     return rawData;
   }
 
-  uint64_t getOffsetInFile() const;
-
   // Input sections are part of an output section. Special sections
   // like .eh_frame and merge sections are first combined into a
   // synthetic section that is then added to an output section. In all