color: Remove flags for true color rendering

third_party/WebKit/Source/platform/RuntimeEnabledFeatures.json5

 {
   // http://dev.chromium.org/blink/runtime-enabled-features
   //
   // This list is used to generate RuntimeEnabledFeatures.h/cpp which contains
   // a class that stores static enablers for all experimental features.
 
   parameters: {
     // Each feature can be assigned a "status":
     // status=stable -> Enable this in all Blink configurations.  We are committed to these APIs indefinitely.
     // status=experimental -> In-progress features, Web Developers might play with, but are not on by default in stable.
@@ skipping 859 matching lines @@
       name: "TouchEventFeatureDetection",
       status: "stable",
     },
     // This is set conditionally in SetRuntimeFeaturesDefaultsAndUpdateFromArgs
     // and will eventually go away when the touchpad/wheel scroll latching is
     // enabled on all platforms (http://crbug.com/526463).
     {
       name: "TouchpadAndWheelScrollLatching",
     },
     {
-      name: "TrueColorRendering",
-      status: "experimental",
-    },
-    {
       name: "TrustedEventsDefaultAction",
       status: "stable",
     },
     {
       name: "WebAnimationsAPI",
       status: "experimental",
     },
     {
       name: "WebAnimationsSVG",
       status: "experimental",
@@ skipping 132 matching lines @@
     {
       name: "BlockLegacySubresources",
       status: "experimental",
     },
     {
       name: "MediaControlsOverlayPlayButton",
       settable_from_internals: true,
     }
   ],
 }