Update Shape.c

Make no sense to say this is experimental and will change in 4.0.0 when we are already above 4.0.0.
This should be removed, or updated to say it will not be in x.0.0

Author: dglaude

shared-bindings/displayio/Shape.c

@@ -41,8 +41,6 @@
 //|
 //| Represents any shape made by defining boundaries that may be mirrored.
 //|
-//| .. warning:: This will likely be changed before 4.0.0. Consider it very experimental.
-//|
 //| .. class:: Shape(width, height, *, mirror_x=False, mirror_y=False)
 //|
 //|   Create a Shape object with the given fixed size. Each pixel is one bit and is stored by the