yoda: warning cleanup sweep (dead code + clippy --fix) (squashed)

Squash of 4 yoda commits:
- 84437e21 yoda: libcosmic-yoda dead-code purge (14->0 warnings)
- 999db0a4 yoda: cosmic-theme cleanup (4->0 warnings) — workspace at 0 warnings total
- 4743bb8e yoda: cargo clippy --fix on libcosmic-yoda (115->33 warnings)
- 675f3b59 chore: reduce local stack warnings

src/applet/row.rs

@@ -1,14 +1,13 @@
 //! Distribute content horizontally.
 use crate::iced;
 use iced::core::alignment::{self, Alignment};
-use iced::core::event::{self, Event};
+use iced::core::event::Event;
 use iced::core::layout::{self, Layout};
 use iced::core::widget::{Operation, Tree};
 use iced::core::{
     Clipboard, Element, Length, Padding, Pixels, Rectangle, Shell, Size, Vector, Widget, mouse,
     overlay, renderer, widget,
 };
-use iced::touch;
 
 /// A container that distributes its contents horizontally.
 ///