Remove callout of lang != compiler

Author: Havvy

src/introduction.md

@@ -21,8 +21,6 @@ Rust has a new language release every six weeks.
 The first stable release of the language was Rust 1.0.0, followed by Rust 1.1.0 and so on.
 Tools (`rustc`, `cargo`, etc.) and documentation ([Standard library], this book, etc.) are released with the language release.
 
-While tools often have the same version as the Rust language, the language exists as its own concept separately from them.
-
 The latest release of this book, matching the latest Rust version, can always be found at <https://doc.rust-lang.org/reference/>.
 Prior versions can be found by adding the Rust version before the "reference" directory.
 For example, the Reference for Rust 1.49.0 is located at <https://doc.rust-lang.org/1.49.0/reference/>.