Updated readme install instructions

README.md

@@ -3,10 +3,6 @@
 Very fast, header-only/compiled, C++ logging library. [![ci](https://github.com/gabime/spdlog/actions/workflows/ci.yml/badge.svg)](https://github.com/gabime/spdlog/actions/workflows/ci.yml)  [![Build status](https://ci.appveyor.com/api/projects/status/d2jnxclg20vd0o50?svg=true&branch=v2.x)](https://ci.appveyor.com/project/gabime/spdlog) [![Release](https://img.shields.io/github/release/gabime/spdlog.svg)](https://github.com/gabime/spdlog/releases/latest)
 
 ## Install
-#### Header-only version
-Copy the include [folder](https://github.com/gabime/spdlog/tree/v2.x/include/spdlog) to your build tree and use a C++17 compiler.
-
-#### Compiled version (recommended - much faster compile times)
 ```console
 $ git clone https://github.com/gabime/spdlog.git
 $ cd spdlog && mkdir build && cd build