fix clippy issues

Signed-off-by: William Casarin <jb55@jb55.com>

src/app.rs

@@ -9,7 +9,7 @@ use crate::timeline::{NoteRef, Timeline};
 use crate::ui::is_mobile;
 use crate::Result;
 
-use egui::{Context, Frame, Margin, Style};
+use egui::{Context, Frame, Style};
 use egui_extras::{Size, StripBuilder};
 
 use enostr::{ClientMessage, Filter, Pubkey, RelayEvent, RelayMessage};

src/ui/mod.rs

@@ -48,6 +48,7 @@ pub fn hline(ui: &egui::Ui) {
 }
 
 #[inline]
+#[allow(unreachable_code)]
 pub fn is_mobile() -> bool {
     #[cfg(feature = "emulate_mobile")]
     {