Remove mlab.quad2cubic

dstansby · dstansby · commit c01d2625f40b · 2018-09-20T12:39:03.000+01:00
diff --git a/doc/api/next_api_changes/2018-09-18-DS.rst b/doc/api/next_api_changes/2018-09-18-DS.rst
@@ -28,4 +28,5 @@ in Matplotlib 2.2 has been removed. See below for a list:
 - `mlab.segments_intersect`
 - `mlab.fftsurr`
 - `mlab.offset_line`
+- `mlab.quad2cubic`
 - `mlab.donothing_callback`
diff --git a/lib/matplotlib/mlab.py b/lib/matplotlib/mlab.py
@@ -2870,21 +2870,3 @@ def path_length(X):
     """
     X = distances_along_curve(X)
     return np.concatenate((np.zeros(1), np.cumsum(X)))
-
-
-@cbook.deprecated('2.2')
-def quad2cubic(q0x, q0y, q1x, q1y, q2x, q2y):
-    """
-    Converts a quadratic Bezier curve to a cubic approximation.
-
-    The inputs are the *x* and *y* coordinates of the three control
-    points of a quadratic curve, and the output is a tuple of *x* and
-    *y* coordinates of the four control points of the cubic curve.
-    """
-    # TODO: Candidate for deprecation -- no longer used internally
-
-    # c0x, c0y = q0x, q0y
-    c1x, c1y = q0x + 2./3. * (q1x - q0x), q0y + 2./3. * (q1y - q0y)
-    c2x, c2y = c1x + 1./3. * (q2x - q0x), c1y + 1./3. * (q2y - q0y)
-    # c3x, c3y = q2x, q2y
-    return q0x, q0y, c1x, c1y, c2x, c2y, q2x, q2y
