Apply suggestions from code review

Co-authored-by: Philipp Hofmann <philipp.hofmann@sentry.io>

CHANGELOG.md

@@ -4,9 +4,9 @@
 
 ### Features
 
-- Add TTID, allows you to measure the time it takes to render the first frame of your screen ([#1910](https://github.com/getsentry/sentry-dart/pull/1910))
+- Add TTID (time to initial display), which allows you to measure the time it takes to render the first frame of your screen ([#1910](https://github.com/getsentry/sentry-dart/pull/1910))
   - Requires using the [routing instrumentation](https://docs.sentry.io/platforms/flutter/integrations/routing-instrumentation/).
-  - Introduces two modes: `automatic` and `manual`.
+  - Introduces two modes: 
     - `automatic` mode is enabled by default for all screens and will yield only an approximation result.
     - `manual` mode requires manual instrumentation and will yield a more accurate result.
       - To use `manual` mode, you need to wrap your desired widget: `SentryDisplayWidget(child: MyScreen())`.

dart/lib/src/sentry_measurement.dart

@@ -46,12 +46,6 @@ class SentryMeasurement {
         value = duration.inMilliseconds,
         unit = DurationSentryMeasurementUnit.milliSecond;
 
-  /// Duration of the time to full display in milliseconds
-  SentryMeasurement.timeToFullDisplay(Duration duration)
-      : assert(!duration.isNegative),
-        name = 'time_to_full_display',
-        value = duration.inMilliseconds,
-        unit = DurationSentryMeasurementUnit.milliSecond;
 
   final String name;
   final num value;