Remove dependency on num-traits

Cargo.toml

@@ -14,7 +14,6 @@ documentation = "https://docs.rs/lambert_w"
 [dependencies]
 fast_polynomial = { version = "0.3.0", default-features = false, optional = true }
 libm = { version = "0.2.8", optional = true }
-num-traits = { version = "0.2", default-features = false, optional = true }
 
 [dev-dependencies]
 approx = { version = "0.5.1", default-features = false }
@@ -33,13 +32,13 @@ default = ["24bits", "50bits", "libm"]
 # May result in slight numerical instability, which can be reduced if the target CPU has fused multiply-add instructions.
 estrin = ["dep:fast_polynomial"]
 # Expose the `LambertW0` and `LambertWm1` traits and their implementations.
-traits = ["dep:num-traits"]
+traits = []
 # If the `std` feature is disabled, this feature uses the [`libm`](https://crates.io/crates/libm) crate
 # to compute square roots and logarithms instead of the standard library.
-libm = ["dep:libm", "fast_polynomial?/libm", "num-traits?/libm"]
+libm = ["dep:libm", "fast_polynomial?/libm"]
 # Use the standard library to compute square roots and logarithms for a potential performance gain.
 # When this feature is disabled the crate is `no_std` compatible.
-std = ["fast_polynomial?/std", "num-traits?/std"]
+std = ["fast_polynomial?/std"]
 
 [package.metadata.docs.rs]
 # Document all features.

src/traits.rs

@@ -1,13 +1,11 @@
-use num_traits::Float;
-
 /// Compute the principal branch of the Lambert W function.
-pub trait LambertW0: Float {
+pub trait LambertW0 {
  /// The principal branch of the Lambert W funciton.
  fn lambert_w0(self) -> Self;
 }
 
 /// Compute the secondary branch of the Lambert W function.
-pub trait LambertWm1: Float {
+pub trait LambertWm1 {
  /// The secondary branch of the Lambert W funciton.
  fn lambert_wm1(self) -> Self;
 }