Remove probe_rs::Session global

[tmplt]

cargo-rtic-scope/cargo-rtic-scope/src/main.rs

Lines 222 to 227 in 20d4b1c

	// XXX This one is messy: a &mut 'a of the session is required to read
	// trace data from it, but sticking it in a Box at the tail-end of trace
	// requires it to be 'static.
	//
	// TODO remove this global
	static mut SESSION: Option<probe_rs::Session> = None;