remove old clipping flags

BUG=skia:

Change-Id: Ic80d918439af27d22bdd101124b72d3182baddc6
NOTRY=True
Reviewed-on: https://skia-review.googlesource.com/5920
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
diff --git a/public.bzl b/public.bzl
index 5cbfc9f..5c2e09f 100644
--- a/public.bzl
+++ b/public.bzl
@@ -593,8 +593,6 @@
     "SK_SUPPORT_LEGACY_IMAGE_ENCODER_CLASS",
     # Temporarily Disable analytic AA for Google3
     "SK_NO_ANALYTIC_AA",
-    "SK_SUPPORT_EXOTIC_CLIPOPS",
-    "SK_SUPPORT_LEGACY_CLIPOPS_PLAIN_ENUM",
     "SK_SUPPORT_LEGACY_BITMAP_SETPIXELREF",
 ]