integrations: Remove unused Jenkins images.

(imported from commit 6e88b4e050b217e2dd6a1201e08b5d71145d2e67)

templates/zephyr/integrations.html

@@ -198,7 +198,7 @@ following, to the stream <code>commits</code> with a subject that matches the re
       like a notification on every build, or only when the build fails
       (Smart Notification).</p>
 
-      <img src="/static/images/integrations/jenkins/003.png">
+      <img src="/static/images/integrations/jenkins/002.png">
 
       <p><strong>Configure a post-build action for your project</strong><br />
       Once you've done that, it's time to configure one of your
@@ -208,14 +208,14 @@ following, to the stream <code>commits</code> with a subject that matches the re
       Actions". Click the dropdown and select "Humbug
       Notification". It should look as below. Then click "Save".</p>
 
-      <img src="/static/images/integrations/jenkins/005.png">
+      <img src="/static/images/integrations/jenkins/003.png">
 
       <p><b>Congratulations! You're done!</b><br /> When your builds
       fail or succeed, you'll see a commit message like the following
       with a subject that matches the project name (in this case
       "Humbug Test"):</p>
-      <img class="screenshot" src="/static/images/integrations/jenkins/006.png">
+      <img class="screenshot" src="/static/images/integrations/jenkins/004.png">
-      <img class="screenshot" src="/static/images/integrations/jenkins/007.png">
+      <img class="screenshot" src="/static/images/integrations/jenkins/005.png">
 
       <p><b>Troubleshooting</b><br />
         <ul>