Weekly DCM Checks: Unused code or files found

[github-actions]

The weekly DCM checks found unused code or files. Please review the findings below.

How to run locally

To run these checks locally, you can use the following commands from the root of the repository:

dcm check-unused-code packages/devtools_app/
dcm check-unused-files packages/devtools_app/

Unused Code

• packages/devtools_app/lib/src/framework/scaffold/status_line.dart:19:1 Unused class StatusLine
• packages/devtools_app/lib/src/framework/scaffold/status_line.dart:24:3 Unused constructor StatusLine
• packages/devtools_app/lib/src/framework/scaffold/status_line.dart:40:3 Unused field deviceInfoTooltip

Unused Files

• packages/devtools_app/lib/src/framework/scaffold/status_line.dart Unused file

[kenzieschmoll]

Closing since this was created as part of testing the new workflow in #9902.