Clean up many small dependencies (part 3) (#8425)

Follow-up to #8353

Release Notes:
- N/A

crates/outline/Cargo.toml

@@ -16,10 +16,8 @@ gpui.workspace = true
 language.workspace = true
 ordered-float.workspace = true
 picker.workspace = true
-postage.workspace = true
 settings.workspace = true
 smol.workspace = true
-text.workspace = true
 theme.workspace = true
 ui.workspace = true
 util.workspace = true