Remove CSP tag from VS Code html

This matches with the html in the VS Code repo and also fixes a problem
with the worker which loads HTML using data: and then can't load any
scripts because 'self' doesn't work.

Author: code-asher

src/browser/pages/vscode.html

@@ -9,11 +9,6 @@
 
     <meta charset="utf-8" />
 
-    <meta
-      http-equiv="Content-Security-Policy"
-      content="font-src 'self' data:; connect-src ws: wss: 'self' https:; default-src ws: wss: 'self'; style-src 'self' 'unsafe-inline'; script-src 'self' 'unsafe-inline' 'unsafe-eval'; manifest-src 'self'; img-src 'self' data: https:;"
-    />
-
     <!-- Disable pinch zooming -->
     <meta
       name="viewport"