Remove SK_SUPPORT_DEPRECATED_CLIPOPS and expanding clip op defs

Bug: skia:10209
Change-Id: I72639b7e768742dcdec810a5a714ce21ff0f6e0a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/436565
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
diff --git a/RELEASE_NOTES.txt b/RELEASE_NOTES.txt
index de4fe08..b17bf01 100644
--- a/RELEASE_NOTES.txt
+++ b/RELEASE_NOTES.txt
@@ -10,6 +10,9 @@
     expanding clip ops guarded by SK_SUPPORT_DEPRECATED_CLIPOPS.
     https://review.skia.org/430897
 
+  * Removed SK_SUPPORT_DEPRECATED_CLIPOPS build flag. Clips can only be intersect and difference.
+    https://review.skia.org/436565
+
 * * *
 
 Milestone 93