Remove some browser specific css from emails

src/sentry/templates/sentry/emails/base.html

@@ -20,8 +20,6 @@
            word-wrap: break-word;
            white-space: pre;
            white-space: pre-wrap;
-           white-space: -moz-pre-wrap;
-           white-space: -o-pre-wrap;
            margin-bottom: 15px;
         }
         a {
@@ -77,8 +75,6 @@
             margin: 4px 0;
             font-weight: normal;
             border-radius: 4px;
-            -moz-border-radius: 4px;
-            -webkit-border-radius: 4px;
         }
         .header h1 {
             margin: 0;
@@ -156,8 +152,6 @@
             margin-right: 10px;
             margin-bottom: 5px;
             border-radius: 4px;
-            -moz-border-radius: 4px;
-            -webkit-border-radius: 4px;
         }
         .tag-list li strong {
             font-weight: 200;
@@ -193,8 +187,6 @@
             width: 60px;
             height: 60px;
             border-radius: 60px;
-            -webkit-border-radius: 60px;
-            -moz-border-radius: 60px;
             line-height: 60px;
             background: #cfd3da;
             text-align: center;