CDRIVER-5967 do not set CMP0042 to OLD (#1973)

Setting to `OLD` had no effect. An rpath was already applied. Setting the policy value to `OLD` is an error in CMake 4.

Author: kevinAlbs

src/libbson/CMakeLists.txt

@@ -29,10 +29,6 @@ set(libbson_VERSION_FULL ${mongo-c-driver_VERSION_FULL})
 set(CMAKE_C_VISIBILITY_PRESET hidden)
 set(CMAKE_CXX_VISIBILITY_PRESET hidden)
 
-if (APPLE)
-   cmake_policy (SET CMP0042 OLD)
-endif ()
-
 #  .d8888b.           888    888    d8b
 # d88P  Y88b          888    888    Y8P
 # Y88b.               888    888

src/libbson/examples/cmake/find_package/CMakeLists.txt

@@ -17,10 +17,6 @@
 
 cmake_minimum_required (VERSION 3.0)
 
-if (APPLE)
-   cmake_policy (SET CMP0042 OLD)
-endif ()
-
 project (hello_bson LANGUAGES C)
 
 # NOTE: For this to work, the CMAKE_PREFIX_PATH variable must be set to point to

src/libbson/examples/cmake/find_package_static/CMakeLists.txt

@@ -17,10 +17,6 @@
 
 cmake_minimum_required (VERSION 2.8)
 
-if (APPLE)
-   cmake_policy (SET CMP0042 OLD)
-endif ()
-
 project (hello_bson LANGUAGES C)
 
 # NOTE: For this to work, the CMAKE_PREFIX_PATH variable must be set to point to

src/libmongoc/examples/cmake/find_package/CMakeLists.txt

@@ -17,10 +17,6 @@
 
 cmake_minimum_required (VERSION 3.0)
 
-if (APPLE)
-   cmake_policy (SET CMP0042 OLD)
-endif ()
-
 project (hello_mongoc LANGUAGES C)
 
 # NOTE: For this to work, the CMAKE_PREFIX_PATH variable must be set to point to

src/libmongoc/examples/cmake/find_package_static/CMakeLists.txt

@@ -17,10 +17,6 @@
 
 cmake_minimum_required (VERSION 3.0)
 
-if (APPLE)
-   cmake_policy (SET CMP0042 OLD)
-endif ()
-
 project (hello_mongoc LANGUAGES C)
 
 # NOTE: For this to work, the CMAKE_PREFIX_PATH variable must be set to point to