Fix no_std build

Cargo.toml

@@ -48,7 +48,7 @@ default = ["std"]
 # Activates usage of std.
 std = ["has-atomics", "ttf-parser/default", "ab_glyph_rasterizer/default"]
 # Uses libm when not using std. This needs to be active in that case.
-libm-math = ["libm"]
+libm-math = ["libm", "ab_glyph_rasterizer/libm"]
 # Some targets don't have atomics, this activates usage of Arc<T> instead of Rc<T>.
 has-atomics = []
 # Adds `gpu_cache` module

src/geometry.rs

 use core::ops;
 
-#[cfg(all(feature = "libm-math", not(feature = "std")))]
-use crate::nostd_float::FloatExt;
-
 /// A point in 2-dimensional space, with each dimension of type `N`.
 ///
 /// Legal operations on points are addition and subtraction by vectors, and

src/lib.rs

@@ -114,8 +114,6 @@ use core::fmt;
 
 #[cfg(all(feature = "libm-math", not(feature = "std")))]
 use crate::nostd_float::FloatExt;
-#[cfg(not(feature = "std"))]
-use alloc::vec::Vec;
 
 /// Good enough relatively equal test for floats.
 macro_rules! relative_eq {

src/nostd_float.rs

 pub(crate) trait FloatExt {
     fn floor(self) -> Self;
     fn ceil(self) -> Self;
-    fn sqrt(self) -> Self;
     fn fract(self) -> Self;
     fn trunc(self) -> Self;
     fn round(self) -> Self;
@@ -18,10 +17,6 @@ impl FloatExt for f32 {
         libm::ceilf(self)
     }
     #[inline]
-    fn sqrt(self) -> Self {
-        libm::sqrtf(self)
-    }
-    #[inline]
     fn fract(self) -> Self {
         self - self.trunc()
     }