STYLE: Remove CMake-language block-end command arguments

Ancient versions of CMake required else(), endif(), and similar block
termination commands to have arguments matching the command starting the block.
This is no longer the preferred style.

cmake/FindKLU.cmake

@@ -3,7 +3,7 @@
 
 if (KLU_INCLUDES AND KLU_LIBRARIES)
   set(KLU_FIND_QUIETLY TRUE)
-endif (KLU_INCLUDES AND KLU_LIBRARIES)
+endif ()
 
 find_path(KLU_INCLUDES
   NAMES
@@ -22,7 +22,7 @@ if(KLU_LIBRARIES)
 
   if(NOT KLU_LIBDIR)
     get_filename_component(KLU_LIBDIR ${KLU_LIBRARIES} PATH)
-  endif(NOT KLU_LIBDIR)
+  endif()
 
   find_library(COLAMD_LIBRARY colamd PATHS ${KLU_LIBDIR} $ENV{KLUDIR} ${LIB_INSTALL_DIR})
   if(COLAMD_LIBRARY)
@@ -39,7 +39,7 @@ if(KLU_LIBRARIES)
     set(KLU_LIBRARIES ${KLU_LIBRARIES} ${BTF_LIBRARY})
   endif()
 
-endif(KLU_LIBRARIES)
+endif()
 
 include(FindPackageHandleStandardArgs)
 find_package_handle_standard_args(KLU DEFAULT_MSG