chore(bigquery): prefer env var to arguments (#1777)

Author: vishwarajanand

bigquery/stackoverflow/stackoverflow.php

@@ -31,17 +31,8 @@
 
 # [END bigquery_simple_app_deps]
 
-// get the project ID as the first argument
-if (2 != count($argv)) {
-    die("Usage: php stackoverflow.php YOUR_PROJECT_ID\n");
-}
-
-$projectId = $argv[1];
-
 # [START bigquery_simple_app_client]
-$bigQuery = new BigQueryClient([
-    'projectId' => $projectId,
-]);
+$bigQuery = new BigQueryClient();
 # [END bigquery_simple_app_client]
 # [START bigquery_simple_app_query]
 $query = <<<ENDSQL

bigquery/stackoverflow/test/stackoverflowTest.php

@@ -21,12 +21,6 @@ class stackoverflowTest extends TestCase
 {
     public function testStackoverflow()
     {
-        global $argv;
-        if (!$projectId = getenv('GOOGLE_PROJECT_ID')) {
-            $this->markTestSkipped('GOOGLE_PROJECT_ID must be set.');
-        }
-        $argv[1] = $projectId;
-
         // Invoke stackoverflow.php
         include __DIR__ . '/../stackoverflow.php';