Remove UI related settings from CLI (#8783)

* Remove all ui reference in dapps interface

* Pass primary cli build

* Add back parity wallet dapp as builtin

* Clean up ui settings

* Fix all tests in cli

* Missed ui files to commit

* Add parity-utils endpoint back

* Fix non-dapp feature compiling

* Inline styles

* Remove parity-utils endpoint

* Remove ui precompiled crate

* Remove parity-ui alltogether

* Remove ui feature flags

* Move errors to static methods

* Fix tests

* Remove all reference to utils endpoint and remove server side injection

According to https://github.com/paritytech/parity/pull/8539, inject.js is already handled by Parity UI.

dapps/src/tests/validation.rs

@@ -37,26 +37,6 @@ fn should_reject_invalid_host() {
 	assert!(response.body.contains("Provided Host header is not whitelisted."), response.body);
 }
 
-#[test]
-fn should_allow_valid_host() {
-	// given
-	let server = serve_hosts(Some(vec!["localhost:8080".into()]));
-
-	// when
-	let response = request(server,
-		"\
-			GET /ui/ HTTP/1.1\r\n\
-			Host: localhost:8080\r\n\
-			Connection: close\r\n\
-			\r\n\
-			{}
-		"
-	);
-
-	// then
-	response.assert_status("HTTP/1.1 200 OK");
-}
-
 #[test]
 fn should_serve_dapps_domains() {
 	// given
@@ -66,28 +46,7 @@ fn should_serve_dapps_domains() {
 	let response = request(server,
 		"\
 			GET / HTTP/1.1\r\n\
-			Host: ui.web3.site\r\n\
-			Connection: close\r\n\
-			\r\n\
-			{}
-		"
-	);
-
-	// then
-	response.assert_status("HTTP/1.1 200 OK");
-}
-
-#[test]
-// NOTE [todr] This is required for error pages to be styled properly.
-fn should_allow_parity_utils_even_on_invalid_domain() {
-	// given
-	let server = serve_hosts(Some(vec!["localhost:8080".into()]));
-
-	// when
-	let response = request(server,
-		"\
-			GET /parity-utils/styles.css HTTP/1.1\r\n\
-			Host: 127.0.0.1:8080\r\n\
+			Host: proxy.web3.site\r\n\
 			Connection: close\r\n\
 			\r\n\
 			{}