diff --git a/python/hccd/path_tracker.py b/python/hccd/path_tracker.py
index 9635ff5..2fe61ad 100644
--- a/python/hccd/path_tracker.py
+++ b/python/hccd/path_tracker.py
@@ -3,10 +3,6 @@ import typing
 import scipy
 
 
-def _sign(val):
-    return -1 * (val < 0) + 1 * (val >= 0)
-
-
 class PathTracker:
     """
     Path trakcer for the homotopy continuation method. Uses a
@@ -43,7 +39,6 @@ class PathTracker:
 
         raise RuntimeError("Newton corrector did not converge")
 
-    # TODO: Make sure the implementation with null_space instead of QR is correct
     def _perform_euler_predictor_step(self, y, step_size) -> typing.Tuple[np.ndarray, np.ndarray]:
         # Obtain y_prime
 
@@ -52,12 +47,6 @@ class PathTracker:
 
         y_prime = ns[:, 0] * self._sigma
 
-        # Q, R = np.linalg.qr(np.transpose(DH), mode="complete")
-        # y_prime = Q[:, 2]
-        #
-        # if _sign(np.linalg.det(Q)*np.linalg.det(R[:2, :])) != _sign(self._sigma):
-        #     y_prime = -y_prime
-
         # Perform prediction
 
         y_hat = y + step_size*y_prime