Remove meta tag CSP directive from index.html since cca inject it by default now

Author: Tankred Hase

src/index.html

@@ -4,9 +4,6 @@
     <meta charset="utf-8">
     <title>Whiteout Mail</title>
 
-    <!-- Theses CSP rules are used as a fallback in runtimes such as Cordova -->
-    <meta http-equiv="Content-Security-Policy" content="default-src 'self' chrome-extension: file: gap:; object-src 'none'; script-src 'self' 'unsafe-eval' chrome-extension: file: gap:; connect-src *; style-src 'self' 'unsafe-inline' chrome-extension: file: gap:; img-src *">
-
     <!-- iOS homescreen link -->
     <meta name="apple-mobile-web-app-capable" content="yes">
     <!-- iOS iPad icon (retina) -->