[docs] Remove references to autoconf build.
llvm-svn: 259281
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: f094e0f3e30f2582efe72a91264a2b29cbf594ea
diff --git a/docs/BuildingLibcxx.rst b/docs/BuildingLibcxx.rst
index f00ce4f..0173326 100644
--- a/docs/BuildingLibcxx.rst
+++ b/docs/BuildingLibcxx.rst
@@ -34,8 +34,7 @@
#. Configure and build libc++ with libc++abi:
- CMake is the only supported configuration system. Unlike other LLVM
- projects autotools is not supported for either libc++ or libc++abi.
+ CMake is the only supported configuration system.
Clang is the preferred compiler when building and using libc++.