Updated comments

Author: wiazur

Search/BingImageSearch/Quickstart/src/main/java/com/microsoft/azure/cognitiveservices/search/imagesearch/samples/BingImageSearchSample.java

@@ -63,14 +63,9 @@ public static void runSample(BingImageSearchAPI client, String searchTerm) {
     public static void main(String[] args) {
         try {
             // Authenticate
-
-            // If you are going to set the BING_SEARCH_V7_SUBSCRIPTION_KEY environment variable, make sure you set it for your OS, then reopen your command prompt or IDE.
-            // If not, you may get an API key not found exception.
-            // IMPORTANT: if you have not set the BING_SEARCH_V7_SUBSCRIPTION_KEY environment variable to your cognitive services API key:
-            // 1. comment out the below line
+            // Set the BING_SEARCH_V7_SUBSCRIPTION_KEY environment variable, 
+            // then reopen your command prompt or IDE for changes to take effect.
             final String subscriptionKey = System.getenv("BING_SEARCH_V7_SUBSCRIPTION_KEY");
-            // 2. paste your cognitive services API key below, and uncomment the line
-            //final String subscriptionKey = System.getenv("BING_SEARCH_V7_SUBSCRIPTION_KEY");
 
             BingImageSearchAPI client = BingImageSearchManager.authenticate(subscriptionKey);
             String searchTerm = "canadian rockies";