drop clang and libc++ part

This will just confuse users without any real benefit.

Building-for-Linux.md

@@ -29,13 +29,6 @@ All other dependencies will be downloaded by [conan](https://conan.io/downloads.
 
 Note: Depending on your distro, the version of CMake you get may not be what's required to build yuzu. Check with `cmake --version`. Version 3.6 or greater is required for you to be able to build!
 
-  * [Clang](https://github.com/llvm-mirror/clang) 3.8 (optional build alternative):
-      | Distro | Commands
-      | ------ | ------------------
-      | Arch   | `sudo pacman -S clang`, `libc++` is in the AUR. Use `yay` to install it.
-      | Debian | `sudo apt-get install clang libc++-dev` (in some distros, clang-3.8)
-      | Gentoo | `emerge sys-devel/clang sys-libs/libcxx`
-
 ### Cloning yuzu with Git
 
 **Master:**
@@ -56,8 +49,6 @@ The `--recursive` option automatically clones the required Git submodules.
 
 ### Building yuzu in Release Mode (Optimized)
 
-#### Using GCC
-
 ```bash
 mkdir build && cd build
 cmake .. -GNinja
@@ -67,39 +58,6 @@ sudo ninja install # (currently doesn't work, needs to be fixed)
 
 Optionally, you can use `cmake-gui ..` to adjust various options (e.g. disable the Qt GUI).
 
-#### Using clang
-
-Note: It is important you use libc++ vs., otherwise your build will likely fail. libc++ is not 100% complete on GNU/Linux, but works well for this build. The libstdc++ std::string is a different data structure than the libc++ std::string. See: [LLVM.org](https://llvm.org/svn/llvm-project/www-releases/trunk/3.8.0/projects/libcxx/docs/UsingLibcxx.html). If libc++ is not used, some warnings are treated as errors. Using clang is only really recommended for users not using GCC >= 5. Also see [Clang Comparison](https://clang.llvm.org/comparison.html).
-
-  ```bash
-  mkdir build && cd build
-  cmake -GNinja \
-        -DCMAKE_CXX_COMPILER=clang++-3.8 \
-        -DCMAKE_C_COMPILER=clang-3.8 \
-        -DCMAKE_CXX_FLAGS="-O2 -g -stdlib=libc++" \
-        ..
-  ninja
-  ```
-
-Debian/Ubuntu: Owing to bug [#808086](https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=808086) the build might
-fail. To have it build, add the following after line 1938 of `/usr/include/c++/v1/string`. (see discussion on
-[StackOverflow](https://stackoverflow.com/questions/37096062/get-a-basic-c-program-to-compile-using-clang-on-ubuntu-16)
-for more details.)
-
-  ```cpp
-  #if _LIBCPP_STD_VER <= 14
-      _NOEXCEPT_(is_nothrow_copy_constructible<allocator_type>::value)
-  #else
-      _NOEXCEPT
-  #endif
-  ```
-
-Additionally, on Ubuntu, do:
-
-  ```bash
-  sudo apt-get install libc++abi-dev && sudo ln -s /usr/include/libcxxabi/__cxxabi_config.h /usr/include/c++/v1/__cxxabi_config.h
-  ```
-
 ### Building yuzu in Debug Mode (Slow)
 
 ```bash