Remove CSP error reporting to report-uri.com

report-uri.com is switching to a paid model, removing the option for
free accounts. While this is their choice, the current project is
non-commercial and lacks the budget to cover $10/month for error
reporting services.

netlify.toml

@@ -101,8 +101,7 @@
     form-action 'self' submit-form.com;
     upgrade-insecure-requests;
     base-uri 'self';
-    manifest-src 'self';
-    report-uri https://egrep.report-uri.com/r/d/csp/enforce"""
+    manifest-src 'self'"""
 
 [[headers]]
   for = '/feeds/*.xml'