build: remove custom rxjs imports rule in favor of import-banlist rule

Author: devversion

tools/tslint-rules/rxjsImportsRule.ts

@@ -114,7 +114,6 @@
     "no-undecorated-class-with-ng-fields": true,
     "setters-after-getters": true,
     "ng-on-changes-property-access": true,
-    "rxjs-imports": true,
     "require-breaking-change-version": true,
     "class-list-signatures": true,
     "coercion-types": [true,
@@ -181,7 +180,9 @@
       "\\w+Rule.ts": "camel-case",
       ".*": "kebab-case"
     }],
-    "no-unescaped-html-tag": true
+    "no-unescaped-html-tag": true,
+    // Ensures that all rxjs imports come only from `rxjs` and `rxjs/operators`.
+    "import-blacklist": [true, ["^rxjs(?!$|/operators$).*"]]
   },
   "linterOptions": {
     "exclude": [