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/service/src/builder.rs

@@ -62,8 +62,7 @@ use sp_runtime::{
 	BuildStorage,
 };
 use sp_utils::mpsc::{tracing_unbounded, TracingUnboundedSender};
-use std::{str::FromStr, sync::Arc};
-use wasm_timer::SystemTime;
+use std::{str::FromStr, sync::Arc, time::SystemTime};
 
 /// A utility trait for building an RPC extension given a `DenyUnsafe` instance.
 /// This is useful since at service definition time we don't know whether the

substrate/client/service/src/config.rs

@@ -23,7 +23,7 @@ pub use sc_client_db::{Database, DatabaseSource, KeepBlocks, PruningMode, Transa
 pub use sc_executor::WasmExecutionMethod;
 pub use sc_network::{
 	config::{
-		ExtTransport, IncomingRequest, MultiaddrWithPeerId, NetworkConfiguration, NodeKeyConfig,
+		IncomingRequest, MultiaddrWithPeerId, NetworkConfiguration, NodeKeyConfig,
 		NonDefaultSetConfig, OutgoingResponse, RequestResponseConfig, Role, SetConfig,
 		TransportConfig,
 	},
@@ -107,9 +107,6 @@ pub struct Configuration {
 	pub prometheus_config: Option<PrometheusConfig>,
 	/// Telemetry service URL. `None` if disabled.
 	pub telemetry_endpoints: Option<TelemetryEndpoints>,
-	/// External WASM transport for the telemetry. If `Some`, when connection to a telemetry
-	/// endpoint, this transport will be tried in priority before all others.
-	pub telemetry_external_transport: Option<ExtTransport>,
 	/// The default number of 64KB pages to allocate for Wasm execution
 	pub default_heap_pages: Option<u64>,
 	/// Should offchain workers be executed.

substrate/client/service/src/metrics.rs

@@ -28,8 +28,10 @@ use sc_transaction_pool_api::{MaintainedTransactionPool, PoolStatus};
 use sp_api::ProvideRuntimeApi;
 use sp_runtime::traits::{Block, NumberFor, SaturatedConversion, UniqueSaturatedInto};
 use sp_utils::metrics::register_globals;
-use std::{sync::Arc, time::Duration};
-use wasm_timer::Instant;
+use std::{
+	sync::Arc,
+	time::{Duration, Instant},
+};
 
 struct PrometheusMetrics {
 	// generic info