message: Remove outdated TODOs in RegisterValue
  These TODOs were for setting m_type in RegisterValue::SetValueFromString
  in the case where reg_info's encoding was eEncodingUint or
  eEncodingSint. m_type is set by SetUInt{8,16,32,64.128} during the
  SetUInt call.
diff: @@ -380,7 +380,6 @@ Status RegisterValue::SetValueFromString(const RegisterInfo *reg_info,
  "unsupported unsigned integer byte size: %u", byte_size);
  break;
  }
  - // TODO: Shouldn't we be setting m_type here?
  break;
  case eEncodingSint:
  @@ -410,8 +409,6 @@ Status RegisterValue::SetValueFromString(const RegisterInfo *reg_info,
  byte_size);
  break;
  }
  -
  - // TODO: Shouldn't we be setting m_type here?
  break;
  case eEncodingIEEE754: {
  