Remove the CMAKE_C_COMPILER_WORKS hack.

This hack worked around some early bugs clang which are fixed now,
so we can remove it. This way, if there's a problem causing clang
to not "work", we won't silently ignore it.

wasi-sdk.cmake

@@ -27,7 +27,3 @@ set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
 set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
 set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
 set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
-
-# Some other hacks
-set(CMAKE_C_COMPILER_WORKS ON)
-set(CMAKE_CXX_COMPILER_WORKS ON)