Revert "Add angle transform"

This reverts commit 97d999e.

Author: 38

plotters-backend/src/text.rs

@@ -135,8 +135,6 @@ pub enum FontTransform {
     Rotate180,
     /// Rotating the text 270 degree clockwise
     Rotate270,
-    /// Rotating the text to an arbitrary degree clockwise
-    RotateAngle(f32),
 }
 
 impl FontTransform {
@@ -151,10 +149,6 @@ impl FontTransform {
             FontTransform::Rotate90 => (-y, x),
             FontTransform::Rotate180 => (-x, -y),
             FontTransform::Rotate270 => (y, -x),
-            FontTransform::RotateAngle(angle) => (
-                ((x as f32) * angle.cos()).round() as i32,
-                ((y as f32) * angle.sin()).round() as i32,
-            ),
         }
     }
 }