Cleanup dependencies (part 4) (#8468)

Follow-up to #8425 . Final part - adds the CI check.

Release Notes:
- N/A

crates/notifications/Cargo.toml

@@ -21,15 +21,11 @@ test-support = [
 anyhow.workspace = true
 channel.workspace = true
 client.workspace = true
-clock.workspace = true
 collections.workspace = true
 db.workspace = true
-feature_flags.workspace = true
 gpui.workspace = true
 rpc.workspace = true
-settings.workspace = true
 sum_tree.workspace = true
-text.workspace = true
 time.workspace = true
 util.workspace = true