COMP: Remove single use variable alias

Remove the GENERATORS_SRC_DIR alias that was only used one time
and was an alias to the muliply used /Generators

Author: hjmjohnson

Wrapping/ConfigureWrapping.cmake

@@ -80,8 +80,6 @@ else()
   set(WRAP_ITK_LIBNAME_PREFIX "")
 endif()
 
-# generators dir
-set(GENERATORS_SRC_DIR "${WRAP_ITK_CMAKE_DIR}/Generators" CACHE INTERNAL "generators source directory")
 
 ###############################################################################
 # Define install files macro. If we are building WrapITK, the generated files

Wrapping/Generators/Python/CMakeLists.txt

@@ -278,7 +278,7 @@ macro(itk_setup_swig_python type base_name interface_file python_file cpp_file d
     # "This version of exception.i should not be used"
     -I${SWIG_DIR}/python
     -I${SWIG_DIR}
-    -I${GENERATORS_SRC_DIR}
+    -I${WRAP_ITK_CMAKE_DIR}/Generators
     -I${WRAP_ITK_TYPEDEFS_DIRECTORY}/python
     -I${WRAP_ITK_TYPEDEFS_DIRECTORY}
     ${WRAP_ITK_SWIG_ARGS_PYTHON}