ui2: Remove dependency on settings crate

Cargo.lock

@@ -9486,7 +9486,6 @@ dependencies = [
  "itertools 0.11.0",
  "rand 0.8.5",
  "serde",
- "settings",
  "smallvec",
  "strum",
  "theme",

crates/ui2/Cargo.toml

@@ -10,7 +10,6 @@ chrono = "0.4"
 gpui2 = { path = "../gpui2" }
 itertools = { version = "0.11.0", optional = true }
 serde.workspace = true
-settings = { path = "../settings" }
 smallvec.workspace = true
 strum = { version = "0.25.0", features = ["derive"] }
 theme = { path = "../theme" }