Remove substrate-in-the-browser (#9541)

* Comment out browser stuff

* Remove browser stuff

* Remove more wasm transport code

* Remove ExtTransport and rework how telemetry initialises.

* Change (most) wasm-timer using code to use std::time

* Rename CI-job

* Aura does not compile for wasm

* Remove testing in the browser on CI

* Update README

* Leave `StreamSink` be

* fmt

substrate/client/transaction-pool/src/lib.rs

@@ -63,7 +63,7 @@ use sp_runtime::{
 	generic::BlockId,
 	traits::{AtLeast32Bit, Block as BlockT, Extrinsic, Header as HeaderT, NumberFor, Zero},
 };
-use wasm_timer::Instant;
+use std::time::Instant;
 
 use crate::metrics::MetricsLink as PrometheusMetrics;
 use prometheus_endpoint::Registry as PrometheusRegistry;