unused deps? (#2809)

# Objective

- less deps.

## Solution

- delete button.

Author: gilescope

crates/bevy_ui/Cargo.toml

@@ -13,7 +13,6 @@ keywords = ["bevy"]
 bevy_app = { path = "../bevy_app", version = "0.5.0" }
 bevy_asset = { path = "../bevy_asset", version = "0.5.0" }
 bevy_core = { path = "../bevy_core", version = "0.5.0" }
-bevy_derive = { path = "../bevy_derive", version = "0.5.0" }
 bevy_ecs = { path = "../bevy_ecs", version = "0.5.0" }
 bevy_input = { path = "../bevy_input", version = "0.5.0" }
 bevy_log = { path = "../bevy_log", version = "0.5.0" }

crates/bevy_window/Cargo.toml

@@ -11,7 +11,6 @@ keywords = ["bevy"]
 [dependencies]
 # bevy
 bevy_app = { path = "../bevy_app", version = "0.5.0" }
-bevy_ecs = { path = "../bevy_ecs", version = "0.5.0" }
 bevy_math = { path = "../bevy_math", version = "0.5.0" }
 bevy_utils = { path = "../bevy_utils", version = "0.5.0" }