Revert "Split Python OBJ importer and exporter, enabling only the importer."

This reverts commit ff9dc1986e.

tests/python/CMakeLists.txt

@@ -324,10 +324,7 @@ add_blender_test(
 )
 endif()
 
-if(FALSE)
 # OBJ Export tests
-# Disabled because new C++ Obj exporter has C++ tests.
-
 add_blender_test(
   export_obj_cube
   ${TEST_SRC_DIR}/io_tests/blend_geometry/all_quads.blend
@@ -348,6 +345,8 @@ add_blender_test(
   --md5=a733ae4fa4a591ea9b0912da3af042de --md5_method=FILE
 )
 
+# disabled until updated & working
+if(FALSE)
 add_blender_test(
   export_obj_all_objects
   ${TEST_SRC_DIR}/io_tests/blend_scene/all_objects.blend