user: remove dead scroll state from thalamus and unconscious screens

Both had scroll: u16 fields that were never connected to any key
handling or rendering. The unconscious screen renders fixed-size
graph health gauges; thalamus builds a paragraph but never scrolled
it. Neither needs scroll state.

Co-Authored-By: Kent Overstreet <kent.overstreet@gmail.com>

src/user/thalamus.rs

@@ -13,12 +13,11 @@ use super::{App, ScreenView, screen_legend};
 
 pub(crate) struct ThalamusScreen {
     sampling_selected: usize,
-    scroll: u16,
 }
 
 impl ThalamusScreen {
     pub fn new() -> Self {
-        Self { sampling_selected: 0, scroll: 0 }
+        Self { sampling_selected: 0 }
     }
 }
 
@@ -148,8 +147,7 @@ impl ScreenView for ThalamusScreen {
 
         let para = Paragraph::new(lines)
             .block(block)
-            .wrap(Wrap { trim: false })
-            .scroll((self.scroll, 0));
+            .wrap(Wrap { trim: false });
 
         frame.render_widget(para, area);
     }