Changing up the starting CSS a bit

Author: tjvantoll

index.html

@@ -463,7 +463,6 @@ <h4 class="exercise-start">
 </code></pre>
 <p>Next, open your app’s <code>app/pages/login/login.common.css</code> file and paste in the following code:</p>
 <pre><code class="lang-CSS">StackLayout {
-  margin-top: 130;
   margin-left: 30;
   margin-right: 30;
   padding-bottom: 15;

src/chapters/chapter2.md

@@ -316,7 +316,6 @@ Next, open your app’s `app/pages/login/login.common.css` file and paste in the
 
 ``` CSS
 StackLayout {
-  margin-top: 130;
   margin-left: 30;
   margin-right: 30;
   padding-bottom: 15;