Remove MinikinSkiaFont::GetGlyph.

MinikinSkiaFont::GetGlyph is no longer used and MinikinFont:GetGlyph
interface is removed by I13398503841ac06f930b04815017d4b33338efa1.
No behavior chnages are expected with this CL.

Change-Id: I8496aad446c6809f74a5effc7ef1baa25c4381b8
2 files changed