refactor the test to fix lint issue

Author: vijaykanthm

security-center/snippets/system-test/v2/assetSecurityMarks.test.js

@@ -18,7 +18,6 @@ const {SecurityCenterClient} = require('@google-cloud/security-center');
 const {assert} = require('chai');
 const {describe, it, before} = require('mocha');
 const {execSync} = require('child_process');
-const exec = cmd => execSync(cmd, {encoding: 'utf8'});
 
 // TODO(developers): update for your own environment
 const organizationId = '1081635000895';
@@ -42,7 +41,9 @@ describe('client with security marks for assets', async () => {
     console.log('data %j', data);
   });
   it('client can add security marks to asset.', () => {
-    const output = execSync(`node v2/addSecurityMarks.js ${data.assetName}`).toString();
+    const output = execSync(
+      `node v2/addSecurityMarks.js ${data.assetName}`
+    ).toString();
     assert.include(output, data.assetName);
     assert.match(output, /key_a/);
     assert.match(output, /value_a/);
@@ -55,7 +56,9 @@ describe('client with security marks for assets', async () => {
     // Ensure marks are set.
     execSync(`node v2/addSecurityMarks.js ${data.assetName}`).toString();
 
-    const output = execSync(`node v2/addDeleteSecurityMarks.js ${data.assetName}`).toString();
+    const output = execSync(
+      `node v2/addDeleteSecurityMarks.js ${data.assetName}`
+    ).toString();
     assert.match(output, /key_a/);
     assert.match(output, /new_value_a/);
     assert.notMatch(output, /key_b/);