Backport PR matplotlib#20171: Remove unsupported arguments from tricontourf documentation

Author: ianthomas23

lib/matplotlib/tri/tricontour.py

@@ -180,13 +180,6 @@ def _contour_args(self, args, kwargs):
 
 Other Parameters
 ----------------
-corner_mask : bool, default: :rc:`contour.corner_mask`
-    Enable/disable corner masking, which only has an effect if *Z* is
-    a masked array.  If ``False``, any quad touching a masked point is
-    masked out.  If ``True``, only the triangular corners of quads
-    nearest those points are always masked out, other triangular
-    corners comprising three unmasked points are contoured as usual.
-
 colors : color string or sequence of colors, optional
     The colors of the levels, i.e., the contour %(type)s.
 
@@ -272,16 +265,7 @@ def _contour_args(self, args, kwargs):
 antialiased : bool, optional
     Enable antialiasing, overriding the defaults.  For
     filled contours, the default is *True*.  For line contours,
-    it is taken from :rc:`lines.antialiased`.
-
-nchunk : int >= 0, optional
-    If 0, no subdivision of the domain.  Specify a positive integer to
-    divide the domain into subdomains of *nchunk* by *nchunk* quads.
-    Chunking reduces the maximum length of polygons generated by the
-    contouring algorithm which reduces the rendering workload passed
-    on to the backend and also requires slightly less RAM.  It can
-    however introduce rendering artifacts at chunk boundaries depending
-    on the backend, the *antialiased* flag and value of *alpha*.""")
+    it is taken from :rc:`lines.antialiased`.""")
 
 
 @docstring.Substitution(func='tricontour', type='lines')