rm textencoding flag -- rely on clients to opt-in

... need to wait for clients

Bug: skia:
Change-Id: Ibcb51b48528140028d3756ce9319f80c967daacd
Reviewed-on: https://skia-review.googlesource.com/c/173987
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
diff --git a/include/core/SkFontTypes.h b/include/core/SkFontTypes.h
index 39250e9..912e7de 100644
--- a/include/core/SkFontTypes.h
+++ b/include/core/SkFontTypes.h
@@ -11,11 +11,6 @@
 #include "SkScalar.h"
 #include "SkTypeface.h"
 
-// TODO: add to clients, and then remove from here.
-#ifndef SK_SUPPORT_LEGACY_TEXTENCODINGENUM
-#define SK_SUPPORT_LEGACY_TEXTENCODINGENUM
-#endif
-
 #ifdef SK_SUPPORT_LEGACY_TEXTENCODINGENUM
 enum SkTextEncoding : uint8_t {
     kUTF8_SkTextEncoding,