always compile bundled voro++ version

CMakeLists.txt

@@ -26,25 +26,10 @@ if(CM_ALL_VTK_OUTPUT)
 endif(CM_ALL_VTK_OUTPUT)
 
 if(CM_ALL_VORONOI)
-    find_package(VORO)
-    if(NOT VORO_FOUND)
-        message(STATUS "voro++ not found by cmake, trying to find voro++ in system")
-        find_library(CM_ALL_VORO_LIB voro++ PATH_SUFFIXES lib)
-        find_path(CM_ALL_VORO_INC "voro++.hh" PATH_SUFFIXES include)
-        if (CM_ALL_VORO_LIB AND CM_ALL_VORO_INC)
-            message(STATUS "voro++ found in system, using system version")
-        elseif(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/contrib/voro++)
-            message(STATUS "voro++ not found in system, compiling version in contrib/voro++")
+    message(STATUS "compiling voro++ version in contrib/voro++")
     add_subdirectory(contrib/voro++)
     set(CM_ALL_VORO_INC ../contrib/voro++/include)
     set(CM_ALL_VORO_LIB "-L../contrib/voro++/src -lvoro")
-        else()
-            message(FATAL_ERROR "no version of voro++ found, cannot use CM_ALL_VORONOI!")
-        endif()
-    else()
-        set(CM_ALL_VORO_INC ${VORO_INCLUDE_DIRS})
-        set(CM_ALL_VORO_LIB ${VORO_LIBRARY_DIRS})
-    endif()
     add_compile_options("-DALL_VORONOI")
 endif()