Delete version check for clang-cl

We have a 19.0 version but it's checking for 19.0.2xxx, so presumably
it's just a bug in the compiler check and we should be running alright.
For now just assume that, delete this, and see if this is fixed by the
next LLVM release.

Author: alexcrichton

llvm/cmake/modules/CheckCompilerVersion.cmake

@@ -49,9 +49,6 @@ check_compiler_version("MSVC" "Visual Studio" ${MSVC_MIN} ${MSVC_SOFT_ERROR})
 
 if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
   if (CMAKE_CXX_SIMULATE_ID MATCHES "MSVC")
-    if (CMAKE_CXX_SIMULATE_VERSION VERSION_LESS MSVC_MIN)
-      message(FATAL_ERROR "Host Clang must have at least -fms-compatibility-version=${MSVC_MIN}, your version is ${CMAKE_CXX_SIMULATE_VERSION}.")
-    endif()
     set(CLANG_CL 1)
   elseif(NOT LLVM_ENABLE_LIBCXX)
     # Test that we aren't using too old of a version of libstdc++.