message: Delete dead function.
  Can reintroduce when needed.
diff: @@ -694,18 +694,6 @@ static void emitOpDefinitions(const RecordKeeper &recordKeeper,
  emitOpClasses(defs, os);
  }
  -static void emitOpDefFile(const RecordKeeper &recordKeeper, raw_ostream &os) {
  - emitSourceFileHeader("Op def file", os);
  -
  - const auto &defs = recordKeeper.getAllDerivedDefinitions("Op");
  - os << "#ifndef ALL_OPS\n#define ALL_OPS(OP, NAME)\n#endif\n";
  - for (const auto *def : defs) {
  - os << "ALL_OPS(" << def->getName() << ", \""
  - << def->getValueAsString("opName") << "\")\n";
  - }
  - os << "#undef ALL_OPS";
  -}
  -
  static mlir::GenRegistration
  genOpDefinitions("gen-op-definitions", "Generate op definitions",
  [](const RecordKeeper &records, raw_ostream &os) {
  