Description of problem:
cmake adds "-ldl" to Windows builds, diverging from upstream

https://src.fedoraproject.org/rpms/cmake/c/ad0e43afe6e48a9189135429c183fbf00bf547ba

Version-Release number of selected component (if applicable):
cmake-3.24.1-1.fc38

How reproducible:
always

Steps to Reproduce:
1. Cross-compile the Ceph Windows client in two environments: Ubuntu and RHEL
2. Note the build flags
3. Note the build results

Actual results:
On Ubuntu, the Ceph Windows client cross-compiles successfully. There is no reference to "-ldl" in the build logs.

Expected results:
On RHEL and Fedora, the Ceph Windows client fails to cross-compile because the compiler fails when searching for "-ldl" ("No such file or directory").

Additional info:
In https://src.fedoraproject.org/rpms/cmake/c/ad0e43afe6e48a9189135429c183fbf00bf547ba, Sandro patched the CMAKE_DL_LIBS variable. On Ubuntu (and cmake upstream), CMAKE_DL_LIBS is blank, but on Fedora, it's now "dl".

The upstream CMake maintainers rejected this patch, so it's a good idea to remove this patch from Fedora as well.