Use embassy/defmt-timestamp-uptime in all examples.

examples/stm32l4/src/bin/adc.rs

@@ -2,13 +2,13 @@
 #![no_main]
 #![feature(type_alias_impl_trait)]
 
-#[path = "../example_common.rs"]
-mod example_common;
+use defmt_rtt as _; // global logger
+use panic_probe as _;
 
+use defmt::*;
 use embassy::time::Delay;
 use embassy_stm32::adc::{Adc, Resolution};
 use embassy_stm32::pac;
-use example_common::*;
 
 #[cortex_m_rt::entry]
 fn main() -> ! {