Remove getBitfieldOp missing feature

Author: Andres-Salamanca

clang/include/clang/CIR/MissingFeatures.h

@@ -204,7 +204,6 @@ struct MissingFeatures {
   static bool fastMathFlags() { return false; }
   static bool fpConstraints() { return false; }
   static bool generateDebugInfo() { return false; }
-  static bool getBitfieldOp() { return false; }
   static bool hip() { return false; }
   static bool implicitConstructorArgs() { return false; }
   static bool incrementProfileCounter() { return false; }