Remove CMake Policy CMP0015 until it is revised

We revert commit "Create CMake Policy CMP0015 to fix set(CACHE)" because
the NEW behavior of the policy breaks a valid use case:

  # CMakeLists.txt
  option(BUILD_SHARED_LIBS "..." ON)
  add_library(mylib ...)
  set(BUILD_SHARED_LIBS OFF) # we want only mylib to be shared
  add_subdirectory(ThirdParty)

  # ThirdParty/CMakeLists.txt
  option(BUILD_SHARED_LIBS "..." ON)
  # uh, oh, with NEW behavior this dir uses shared libs!!!

We'll re-introduce the policy later with a different change in behavior
to resolve the motivating case, which was more subtle but less common.

See issue #9008.

1 files changed, 0 insertions, 5 deletions

diff --git a/Source/cmMakefile.h b/Source/cmMakefile.h
index cb180ba..63f81b8 100644
--- a/Source/cmMakefile.h
+++ b/Source/cmMakefile.h
@@ -286,11 +286,6 @@ public:
                           bool force = false);
 
   /**
-   * Update the variable scope to make the cache definition visible.
-   */
-  void UseCacheDefinition(cmCacheManager::CacheIterator const& it);
-
-  /**
    * Add bool variable definition to the build. 
    */
   void AddDefinition(const char* name, bool);