No--it's not that kind of censor in which you'll find in To-love-ru. This is about the GLROIO top image you can see on this week's Annotated Anime. The Crunchyroll stream for this week's Girls und Panzer appeared on Wednesday night, after the obligatory 2-day delay from the initial Japanese broadcast. It was missing something. It turns out that the rather epic segment where sort-of-Russian schoolgirls singing "Katyusha," the Soviet folk song made popular during WWII, was unceremoniously cut from the Crunchyroll stream. You can watch a clip of what was cut right above.
The cut footage details a "Russian" tank battalion rolling down the snow-covered landscape in their match with the protagonists' Sensha-do (the art of tank battle) team. It's rather epic, you see, because columns of T-34 tanks are awesome; because hearing Russophile voice actress Sumire Uesaka singing in her pretty-good Russian is awesome. What is probably not as awesome is copyright law.