message: Removes redundant imports on text.rs
diff: use glyph_brush::GlyphPositioner;
  use glyph_brush::{self, FontId, Layout, Section, Text as GbText};
  pub use glyph_brush::{ab_glyph::PxScale, GlyphBrush, HorizontalAlign as Align};
  -use mint;
  use std::borrow::Cow;
  use std::cell::RefCell;
  use std::f32;
  