- 
Andrew Kolos authored`DevFSBytesContent` (and it's descendant `DevFSStringContent`) have setters that change the underlying content. These are unused outside of tests, so this PR removes them. Amongst other things, this could help me refactor https://github.com/flutter/flutter/pull/144660 into something that has fewer pitfalls. This is purely a refactoring. 
| Name | Last commit | Last update | 
|---|---|---|
| .. | ||
| bin | ||
| doc | ||
| gradle | ||
| ide_templates/intellij | ||
| lib | ||
| static | ||
| templates | ||
| test | ||
| tool | ||
| README.md | ||
| analysis_options.yaml | ||
| dart_test.yaml | ||
| pubspec.yaml |