CMake: Remove unnecessary `unset' which was not supported by old cmake

releases.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86644 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/cmake/config-ix.cmake b/cmake/config-ix.cmake
index ca5e0bfe384cb8ae11ee942aad060732e793a711..28dee471ef06d5cfae5a25c98d52094b35020344 100755 (executable)
--- a/cmake/config-ix.cmake
+++ b/cmake/config-ix.cmake
@@ -136,7 +136,6 @@ function(llvm_find_program name)
     mark_as_advanced(HAVE_${NAME})
   else(LLVM_PATH_${NAME})
     set(HAVE_${NAME} "" CACHE INTERNAL "Is ${name} available ?")
-    unset(LLVM_PATH_${NAME} CACHE)
   endif(LLVM_PATH_${NAME})
 endfunction()