Deprecating a bunch of useless functions.

[moufmouf]

See #15

[stof]

does Mouf support reporting deprecations using the convention introduced in symfony (i.e. @trigger_error('...', E_USER_DEPRECATED), so that error handlers not supporting the convention don't convert the deprecation warning to an exception thus breaking things) ?
If no, you should probably provide an integration of the Twig_Util_DeprecationCollector, to find usage of deprecated Twig features

[stof]

given that the translate function would still require at least 1 argument, you would make this change directly in translate and use the same implementation for the function and the filter

[moufmouf]

Oh nice! 👍

[stof]

should the t function be deprecated in favor of the t filter ?

[moufmouf]

should the t function be deprecated in favor of the t filter ?

True.

[moufmouf]

If no, you should probably provide an integration of the Twig_Util_DeprecationCollector, to find usage of deprecated Twig features

I'll open a separate issue for this.