Cherry-pick r234714: [MC] Write padding into fragments when -mc-relax-all flag is used

include/llvm/MC/MCAsmLayout.h

Index: include/llvm/MC/MCAsmLayout.h
diff --git a/include/llvm/MC/MCAsmLayout.h b/include/llvm/MC/MCAsmLayout.h
index f048e34671db4c42d569062c1381410fa9ef22e4..6b081421399046a70ab0ed5ce1902d72f440043d 100644
--- a/include/llvm/MC/MCAsmLayout.h
+++ b/include/llvm/MC/MCAsmLayout.h
@@ -50,11 +50,6 @@ private:
   /// \brief Is the layout for this fragment valid?
   bool isFragmentValid(const MCFragment *F) const;
 
-  /// \brief Compute the amount of padding required before this fragment to
-  /// obey bundling restrictions.
-  uint64_t computeBundlePadding(const MCFragment *F,
-                                uint64_t FOffset, uint64_t FSize);
-
 public:
   MCAsmLayout(MCAssembler &_Assembler);