Remove outdated language files

[hugosolar]

Problem Description

Since the last major update of the plugin, there are outdated files in the language folder

Solution Description

Investigate which files are outdated and remove them from the repository

[elaynelemos]

Hey! I would like to work on it if still available.

[kgodey]

go ahead @elaynelemos

[Cronus1007]

@hugosolar Shall i take over this issue.

[hugosolar]

@Cronus1007 sure! Thank you very much