Remove the MCObjectFormat class.

llvm-svn: 122147
diff --git a/llvm/lib/MC/MachObjectWriter.cpp b/llvm/lib/MC/MachObjectWriter.cpp
index 6ebc782..42cf43f 100644
--- a/llvm/lib/MC/MachObjectWriter.cpp
+++ b/llvm/lib/MC/MachObjectWriter.cpp
@@ -1123,6 +1123,12 @@
                        UndefinedSymbolData);
   }
 
+  bool isAbsolute(bool IsSet, const MCSymbol &A,
+                                     const MCSymbol &B) const  {
+    // On MachO A - B is absolute only if in a set.
+    return IsSet;
+  }
+
   bool IsSymbolRefDifferenceFullyResolved(const MCAssembler &Asm,
                                           const MCSymbolRefExpr *A,
                                           const MCSymbolRefExpr *B) const {