[upstream_utils] Remove Eigen intellisense fix

[calcmogul]

FRC Code intellisense continued to work in developerRobot with a QR decomposition.

[calcmogul]

Here's what I had in developerRobot/src/main/native/cpp/Robot.cpp:

#include <Eigen/QR>

int main() {
  Eigen::Matrix<double, 3, 3> A;
  A.setZero();
  Eigen::Vector<double, 3> b;
  b.setZero();
  A.householderQr().solve(b);
}