Revert of experiment with zero-length round capped line segments

include/core/SkPaint.h

Index: include/core/SkPaint.h
diff --git a/include/core/SkPaint.h b/include/core/SkPaint.h
index 0c071ad361416c859fa006db17395cae79e43e1b..1b993fc5ea8a92b947d3d48355b329917265b22b 100644
--- a/include/core/SkPaint.h
+++ b/include/core/SkPaint.h
@@ -398,15 +398,6 @@
     /** Cap enum specifies the settings for the paint's strokecap. This is the
         treatment that is applied to the beginning and end of each non-closed
         contour (e.g. lines).
-
-        If the cap is round or square, the caps are drawn when the contour has
-        a zero length. Zero length contours can be created by following moveTo
-        with a lineTo at the same point, or a moveTo followed by a close.
-
-        A dash with an on interval of zero also creates a zero length contour.
-
-        The zero length contour draws the square cap without rotation, since
-        the no direction can be inferred.
     */
     enum Cap {
         kButt_Cap,      //!< begin/end contours with no extension