Update README

Author: mbrubeck

README.md

@@ -2,16 +2,6 @@
 
 Provides several wrapper types for Ord and Eq implementations on f64.
 
-## Usage
-
-Use the crates.io repository; add this to your `Cargo.toml` along
-with the rest of your dependencies:
-
-```toml
-[dependencies]
-ordered-float = "2.0"
-```
-
 See the [API documentation](https://docs.rs/ordered-float) for further details.
 
 ## no_std