(Rewritten by @andrewkolos)

• Remove dependency on package:usage in the g3 flutter tool (or at least get the OK to delete it)
  • b/361811035
• Remove code dependent on package:usage in the flutter tool (packages/flutter_tools). Fix pre-existing bugs along the way.
  • Remove all usages of the deprecated usage package #150667
  • [tool] Remove some usages of deprecated usage package #151359
  • [tool] remove some more usages of package:usage #151517
  • [tool] Remove all usages of the deprecated usage package #151518
  • Remove some usages of package:usage #159705
  • Fix analytics enabled/disabled event not being sent when the user enables/disables analytics #160060
  • Remove more references to deprecated package:usage (executable, runner) #160369
  • remove usage of Usage from build system #160663
  • remove dependency on Usage from Pub class #162279
  • remove more (simple) usage of package:usage #162354
  • Delete FlutterCommand.usageValues #162468
  • [reland] delete FlutterCommand.usageValues #162550
  • Get analytics welcome message under test #162627
  • delete Usage in doctor tests #162646
  • delete references to Usage in config_test.dart #162648
  • delete almost all remaining references to package:usage #162658
• Remove package:usage dependency from packages/flutter_tools

Original description (Jun 20)

The package is deprecated.
The analytics configuration is gone.

Zero reason to keep it, right?