Improve invoice 1 template css (#872)

There is no class "header" that's why I removed it. Also I fixed some whitespace issues

resources/views/app/pdf/invoice/invoice1.blade.php

@@ -15,7 +15,6 @@
             margin: 0px;
             padding: 0px;
             margin-top: 50px;
-
         }
 
         .text-center {
@@ -36,7 +35,6 @@
             left: 0px;
             width: 100%;
             margin-left: 0%;
-
         }
 
         .header-container {
@@ -52,12 +50,6 @@
             padding-bottom: 20px;
             text-transform: capitalize;
             color: #817AE3;
-
-        }
-
-        .header {
-            font-size: 20px;
-            color: rgba(0, 0, 0, 0.7);
         }
 
         .content-wrapper {