fixing linux stuff

src/app.rs

@@ -110,7 +110,6 @@ impl App {
                 show_scope: self.audio.config.show_scope,
                 show_spectrum: self.audio.config.show_spectrum,
                 show_completion: self.ui.show_completion,
-                flash_brightness: self.ui.flash_brightness,
                 color_scheme: self.ui.color_scheme,
                 layout: self.audio.config.layout,
                 hue_rotation: self.ui.hue_rotation,
@@ -1384,10 +1383,6 @@ impl App {
                     .editor
                     .set_completion_enabled(self.ui.show_completion);
             }
-            AppCommand::AdjustFlashBrightness(delta) => {
-                self.ui.flash_brightness = (self.ui.flash_brightness + delta).clamp(0.0, 1.0);
-            }
-
             // Live keys
             AppCommand::ToggleLiveKeysFill => {
                 self.live_keys.flip_fill();