apns-conf: Remove deprecated Cosmote Romania entries

Cosmote Romania was officially rebranded as Telekom Romania in 2014. The legacy APNs serve no functional purpose and may interfere with correct network configurations.

On LineageOS, defunct Cosmote APNs are selected by default, preventing mobile data from working out-of-the-box for Telekom Romania users.

This commit also removes MCC 226 / MNC 06 entries, which are no longer allocated according to mcc-mnc.com.

Change-Id: I1fbd563e8973aaf590ba7fee8ac4ebb6140649e4