[cmake] Remove stale comment. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@274212 91177308-0d34-0410-b5e6-96231b3b80d8

Author: gottesmm

cmake/modules/ClangConfig.cmake.in

@@ -1,9 +1,5 @@
 # This file allows users to call find_package(Clang) and pick up our targets.
 
-# Clang doesn't have any CMake configuration settings yet because it mostly
-# uses LLVM's. When it does, we should move this file to ClangConfig.cmake.in
-# and call configure_file() on it.
-
 find_package(LLVM REQUIRED CONFIG)
 
 @CLANG_CONFIG_CODE@