{%= title %}

Once you start developing your own app / lib, you should remove all unnecessary parts left from the sample app.

In index.html <body> tag, everything should be removed, except the <script> tag that initializes Amber and starts your app; then you can add elements specific to your own app to the page.
If you aren't going to use Web package from amber-contrib-web module, but want to retain the jQuery wrapper, you should run bower uninstall amber-contrib-web --save from your CLI.
If you aren't going to use the Web package from the amber-contrib-web module, nor the jQuery wrapper from amber-contrib-jquery, you should run bower uninstall amber-contrib-web amber-contrib-jquery --save from your CLI.
You cannot remove just the jQuery wrapper and retain the Web package, as it depends on the jQuery wrapper.
As the last step, make sure the dependency tree is in a correct state by recreating it: first delete your bower_components folder, then run bower install from your CLI.