remove unneeded android flags

BUG=skia:

Change-Id: Ie8bbddb8fc4bcdb8e87883512f548cf63520366c
Reviewed-on: https://skia-review.googlesource.com/8475
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
diff --git a/gn/android_framework_defines.gni b/gn/android_framework_defines.gni
index 15e167d..b693d28 100644
--- a/gn/android_framework_defines.gni
+++ b/gn/android_framework_defines.gni
@@ -16,6 +16,4 @@
   "SK_SUPPORT_LEGACY_SHADER_ISABITMAP",
   "SK_SUPPORT_LEGACY_EMBOSSMASKFILTER",
   "SK_SUPPORT_EXOTIC_CLIPOPS",
-  "SK_SUPPORT_LEGACY_SCALARMUL",
-  "SK_SUPPORT_BARE_PTR_IMAGEGENERATOR",
 ]