Remove a few ultra-verbose logs.

They're heavily spamming logs for HIL tests, and I don't believe
they're valuable now that the thing they helped debug in their young
age is now solid and mature.

embassy-rp/src/uart/buffered.rs

@@ -490,8 +490,6 @@ impl<T: Instance> interrupt::typelevel::Handler<T::Interrupt> for BufferedInterr
             w.set_oeic(ris.oeris());
         });
 
-        trace!("on_interrupt ris={:#X}", ris.0);
-
         // Errors
         if ris.feris() {
             warn!("Framing error");