Remove arbitrary limit on number of composed color filters

This effectively reverts https://codereview.chromium.org/972153010/

Note that we have no such hard limit on SkShaders, and it's never
been a problem. Complex SkPaint objects can generate too many FPs
for us to handle, but those are rare, and better managed by just
reporting the shader compile error (which we do).

Change-Id: Iee5dc3d65ec130f2ce0a29e55fbe3c25b00dc828
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/279836
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
3 files changed