samples: Translate API no longer requires an API key. (#425)

Author: jmdobry

translate/snippets/src/main/java/com/example/translate/QuickstartSample.java

@@ -26,11 +26,7 @@
 public class QuickstartSample {
   public static void main(String... args) throws Exception {
     // Instantiates a client
-    Translate translate =
-        TranslateOptions.builder()
-            .apiKey(args[0])  // .apiKey("YOUR_API_KEY")
-            .build()
-            .service();
+    Translate translate = TranslateOptions.getDefaultInstance().getService();
 
     // The text to translate
     String text = "Hello, world!";

translate/snippets/src/test/java/com/example/translate/QuickstartSampleIT.java

@@ -50,11 +50,8 @@ public void tearDown() {
 
   @Test
   public void testQuickstart() throws Exception {
-    // Arrange
-    String apiKey = System.getenv("GOOGLE_API_KEY");
-
     // Act
-    QuickstartSample.main(apiKey);
+    QuickstartSample.main();
 
     // Assert
     String got = bout.toString();