build: allow type-only imports to be used

The internal limitations around type-only imports have been removed so now we can start using them.

(cherry picked from commit af369ea)

Author: crisbeto

src/circular-deps-test.conf.js

@@ -14,6 +14,7 @@ module.exports = {
   glob: `./**/*.ts`,
   // Command that will be displayed if the golden needs to be updated.
   approveCommand: 'yarn ts-circular-deps:approve',
+  ignoreTypeOnlyChecks: true,
   resolveModule,
 };
 

tools/tslint-rules/noTypeOnlyImportExportRule.ts

@@ -61,7 +61,6 @@
     // Custom Rules
     "ts-loader": true,
     "no-exposed-todo": true,
-    "no-type-only-import-export": true,
     "no-private-getters": [true, "^_"],
     "no-undecorated-base-class-di": true,
     "no-undecorated-class-with-angular-features": true,