Issue 46506. Remove 'ignore: unused_element' for @pragma(vm:entry-point)

Now that we understand them, we don't need to ignore.

Bug: https://github.com/dart-lang/sdk/issues/46506
Change-Id: Iab94f14a34f09826dd2101fd4a1bc54909915d56
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/205341
Reviewed-by: Devon Carew <devoncarew@google.com>
Commit-Queue: Konstantin Shcheglov <scheglov@google.com>
diff --git a/sdk/lib/developer/profiler.dart b/sdk/lib/developer/profiler.dart
index dea6b45..f238ae8 100644
--- a/sdk/lib/developer/profiler.dart
+++ b/sdk/lib/developer/profiler.dart
@@ -129,7 +129,6 @@
   }
 
   @pragma("vm:entry-point", !const bool.fromEnvironment("dart.vm.product"))
-  // ignore: unused_element, called from native code
   static String? _printMetric(String id) {
     var metric = _metrics[id];
     if (metric == null) {
@@ -139,7 +138,6 @@
   }
 
   @pragma("vm:entry-point", !const bool.fromEnvironment("dart.vm.product"))
-  // ignore: unused_element, called from native code
   static String _printMetrics() {
     var metrics = [];
     for (var metric in _metrics.values) {