Remove installation instructions for discontinued Funtoo Linux

README.md

@@ -89,7 +89,7 @@ hyperfine -L compiler gcc,clang '{compiler} -O2 main.cpp'
 
 ### Intermediate shell
 
-By default, commands are executed using `sh` on Unix (resolved through `PATH`) or `cmd.exe` on Windows.
+By default, commands are executed using a predefined shell (`/bin/sh` on Unix, `cmd.exe` on Windows).
 If you want to use a different shell, you can use the `-S, --shell <SHELL>` option:
 ```sh
 hyperfine --shell zsh 'for i in {1..10000}; do echo test; done'
@@ -212,13 +212,6 @@ cave resolve -x repository/rust
 cave resolve -x hyperfine
 ```
 
-### On Funtoo Linux
-
-On Funtoo Linux, hyperfine can be installed [from core-kit](https://github.com/funtoo/core-kit/tree/1.4-release/app-benchmarks/hyperfine):
-```
-emerge app-benchmarks/hyperfine
-```
-
 ### On NixOS
 
 On NixOS, hyperfine can be installed [from the official repositories](https://nixos.org/nixos/packages.html?query=hyperfine):