[libcxx] [ci] Don't disable libc++experimental in mingw builds

Since dfa88927ae1411ccc3b248b7e624f2acf623d947, the static
libc++experimental should work in mingw dll builds. (It probably worked
all along in static mingw builds.)

Differential Revision: https://reviews.llvm.org/D129270

diff --git a/libcxx/cmake/caches/MinGW.cmake b/libcxx/cmake/caches/MinGW.cmake
index 14b887e..c16857e 100644 (file)
--- a/libcxx/cmake/caches/MinGW.cmake
+++ b/libcxx/cmake/caches/MinGW.cmake
@@ -1,5 +1,3 @@
-set(LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY OFF CACHE BOOL "")
-
 set(LIBCXX_CXX_ABI libcxxabi CACHE STRING "")
 set(LIBCXXABI_USE_LLVM_UNWINDER ON CACHE BOOL "")