- Remove `sudo` since it's deprecated,
along with the useless `apt update` call
- Remove the manual maven installation since
it's already present on the travis image
by default
This should reduce a bit the time taken for a whole CI run.
This commit should fix the following javascript crash that
may occur if the localstorage isn't available/supported by the browser:
```
more.view:140 Uncaught TypeError: Cannot read property 'playCountValue' of null
at loadShuffleForm (more.view:140)
at HTMLDocument.<anonymous> (more.view:181)
at n (jquery-1.7.1.min.js:2)
at Object.fireWith (jquery-1.7.1.min.js:2)
at Function.ready (jquery-1.7.1.min.js:2)
at HTMLDocument.B (jquery-1.7.1.min.js:2)
```
Signed-off-by: jvoisin <julien.voisin@dustri.org>
