Rename test_environment.ts to initialize.ts.

Author: yuchenshi

packages/rules-unit-testing/index.ts

@@ -22,5 +22,5 @@
  */
 
 export * from './src/public_types';
-export * from './src/test_environment';
+export * from './src/initialize';
 export * from './src/util';

packages/rules-unit-testing/src/test_environment.ts renamed to packages/rules-unit-testing/src/initialize.ts

@@ -38,8 +38,6 @@ import { RulesTestEnvironment, TestEnvironmentConfig } from './public_types';
  * });
  * ```
  */
-export async function initializeTestEnvironment(
-  config: TestEnvironmentConfig
-): Promise<RulesTestEnvironment> {
+export async function initializeTestEnvironment(): Promise<RulesTestEnvironment> {
   throw new Error('unimplemented');
 }