diff --git a/pathfinder/pathfinder.py b/pathfinder/pathfinder.py
deleted file mode 100644
index 64abe4c..0000000
--- a/pathfinder/pathfinder.py
+++ /dev/null
@@ -1,9 +0,0 @@
-import numpy  # type: ignore
-
-
-def circle_cost(x: float, y: float) -> float:
-	return 4 - x**2 - y**2
-
-
-def circle_gradient(x: float, y: float) -> numpy.ndarray:
-	return numpy.array([-2 * x, -2 * y])