Move FastFloat to separate crate (archival)

utils/float/Cargo.toml

@@ -6,7 +6,5 @@ edition = "2018"
 
 [features]
 f32 = []
-fast-float = []
 
 [dependencies]
-num-traits = "0.2.14"

utils/float/src/lib.rs

@@ -1,6 +1,6 @@
 //! The Float type used throughout the ecosystem
 #![no_std]
-#![cfg_attr(feature = "fast-float", feature(core_intrinsics))]
+#![forbid(unsafe_code)]
 
 /// Type used for floats, configure with the `f32` feature
 #[cfg(feature = "f32")]
@@ -16,8 +16,3 @@ pub mod consts {
     #[cfg(not(feature = "f32"))]
     pub use core::f64::consts::*;
 }
-
-#[cfg(feature = "fast-float")]
-mod fastfloat;
-#[cfg(feature = "fast-float")]
-pub use fastfloat::FastFloat;