Going through the comps language support, the current candidates for removal are: m17n:zh:pinyin (subset of m17n:zh:py)
I realize I am too late and this has already been removed, but I think there is some misunderstanding about the purpose of m17n:zh:pinyin. m17n:zh:pinyin is intended for entering pinyin (for example nǐ hǎo). It is not intended for entering characters. Now that m17n:zh:pinyin has been removed, I don't think there is an ibus engine for entering pinyin in the Fedora repos.
I suggest that m17n:zh:pinyin be unblacklisted.
Cheers, Paul