Remove old style NEON defines now that Skia has been updated

skia/BUILD.gn

Index: skia/BUILD.gn
diff --git a/skia/BUILD.gn b/skia/BUILD.gn
index ac61739fe9e5458c06bce221ddf2c8c7f810fbfc..40ef810ada07714773352fc5a9c7d697a60cbf0b 100644
--- a/skia/BUILD.gn
+++ b/skia/BUILD.gn
@@ -180,10 +180,10 @@ config("skia_library_config") {
 
   if (cpu_arch == "arm") {
     if (arm_use_neon) {
-      defines += [ "SK_ARM_HAS_NEON", "__ARM_HAVE_NEON" ]
+      defines += [ "SK_ARM_HAS_NEON" ]
     }
     if (arm_optionally_use_neon) {
-      defines += [ "SK_ARM_HAS_OPTIONAL_NEON", "__ARM_HAVE_OPTIONAL_NEON_SUPPORT" ]
+      defines += [ "SK_ARM_HAS_OPTIONAL_NEON" ]
     }
   }