Prune commentary and stale Rust port notes

benches/fling_spline_reference.py

@@ -31,9 +31,6 @@ END_TENSION = 1.0
 P1 = START_TENSION * INFLEXION
 P2 = 1.0 - END_TENSION * (1.0 - INFLEXION)
 
-# ViewConfiguration.getScrollFriction(), and SplineOverScroller's own
-# "look and feel tuning" constant -- a different number in a different place
-# of the same formula, which is the pair iris got the wrong way round once.
 SCROLL_FRICTION = 0.015
 TUNING = 0.84
 GRAVITY_EARTH = 9.80665
@@ -54,7 +51,6 @@ def spline_positions():
         while True:
             x = x_min + (x_max - x_min) / 2.0
             coef = 3.0 * x * (1.0 - x)
-            # Solved on the P1/P2 curve...
             tx = coef * ((1.0 - x) * P1 + x * P2) + x * x * x
             if abs(tx - alpha) < 1e-5:
                 break
@@ -62,7 +58,6 @@ def spline_positions():
                 x_max = x
             else:
                 x_min = x
-        # ...and sampled on the tension curve.
         position[i] = coef * ((1.0 - x) * START_TENSION + x * END_TENSION) + x * x * x
     position[NB_SAMPLES] = 1.0
     return position