[fuchsia] Remove obsolete TODOs in blink/renderer

Bug: 1104411

Change-Id: I0ad22ab8c852f5c66813136f4a4c07bdcc4e1234
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2427186
Auto-Submit: Fabrice de Gans-Riberi <fdegans@chromium.org>
Reviewed-by: David Dorwin <ddorwin@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Kinuko Yasuda <kinuko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#810454}

third_party/blink/renderer/core/layout/layout_theme_fuchsia.cc

@@ -7,8 +7,7 @@
 namespace blink {
 namespace {
 
-// Fuchsia is headless-only for now, so no native themes are applied.
-// TODO(fuchsia): Implement this when we enable the UI. (crbug.com/750946)
+// There are no special themes on Fuchsia.
 class LayoutThemeFuchsia : public LayoutThemeDefault {
  public:
   static scoped_refptr<LayoutTheme> Create() {

third_party/blink/renderer/platform/text/fuchsia/hyphenation_fuchsia.cc

@@ -8,7 +8,6 @@ namespace blink {
 
 scoped_refptr<Hyphenation> Hyphenation::PlatformGetHyphenation(
     const AtomicString&) {
-  // TODO(fuchsia): Implement this when UI support is ready. crbug.com/750946
   return nullptr;
 }