README.md: Remove outdated claim about build.rs (#116)

This was removed in
#44

Author: aDotInTheVoid

README.md

@@ -10,8 +10,6 @@ cargo build
 
 NOTE: requries [rustup](https://www.rust-lang.org/tools/install)
 
-The `build.rs` script will ensure that the correct version of rust and the required components are installed and defaulted. What `rustup` commands are run can be seen by adding verbosity flag `-vv` to `cargo`.
-
 ## Usage
 
 Use the wrapper script `run.sh` (or `cargo run`, but this may also initiate a build).
@@ -88,4 +86,4 @@ cargo run --bin cargo_stable_mir_json -- $PWD [OPTIONAL-PATH-FOR-DIR]
 ```bash
 RUSTC=<PATH-TO-.stable_mir_json>/<PROFILE>.sh cargo build
 ```
-NOTE: by default `<PATH-TO-.stable_mir_json>` is `~/.stable_mir_json`
+NOTE: by default `<PATH-TO-.stable_mir_json>` is `~/.stable_mir_json`