remove duplicated definition

horizonmetrics.py

@@ -164,29 +164,6 @@ def calculate_horizon_error_across_sequence(slope_error_list,
     return sequence_results
 
 
-def xy_points_to_slope_midpoint(xy_points):
-    """
-    Given two points, return the slope and midpoint of the line
-
-    Args:
-    xy_points: list of two points, each point is a list of two elements
-    Points are in the form of [x, y], where x and y are normalized to [0, 1]
-
-    Returns:
-    slope: Slope of the line
-    midpoint : Midpoint is in the form of [x,y], and is also normalized to [0, 1]
-    """
-
-    x1, y1, x2, y2 = xy_points[0][0], xy_points[0][1], xy_points[1][
-        0], xy_points[1][1]
-    slope = (y2 - y1) / (x2 - x1)
-
-    midpoint_x = 0.5
-    midpoint_y = slope * (0.5 - x1) + y1
-    midpoint = [midpoint_x, midpoint_y]
-    return slope, midpoint
-
-
 def calculate_horizon_error(annotated_horizon, proposed_horizon):
     """
     Calculate the error between the annotated horizon and the proposed horizon