Fix unused import

Author: jdahlstrom

core/src/render/cam.rs

@@ -7,7 +7,7 @@ use crate::math::{
     Angle, orient_z, rotate_x, rotate_y, rotate_z, spherical, turns,
 };
 use crate::math::{
-    Lerp, Mat3, Mat4, Point3, ProjMat3, SphericalVec, Vary, Vec3, orthographic,
+    Lerp, Mat4, Point3, ProjMat3, SphericalVec, Vary, Vec3, orthographic,
     perspective, pt2, translate, viewport,
 };
 use crate::util::{Dims, rect::Rect};