message: Move sktda to GUDHI_PYTHON_MODULES_EXTRA.
diff: @@ -49,8 +49,8 @@ if(PYTHONINTERP_FOUND)
  set(GUDHI_PYTHON_MODULES "${GUDHI_PYTHON_MODULES}'alpha_complex', ")
  set(GUDHI_PYTHON_MODULES "${GUDHI_PYTHON_MODULES}'euclidean_witness_complex', ")
  set(GUDHI_PYTHON_MODULES "${GUDHI_PYTHON_MODULES}'euclidean_strong_witness_complex', ")
  - set(GUDHI_PYTHON_MODULES "${GUDHI_PYTHON_MODULES}'sktda', ")
  # Modules that should not be auto-imported in __init__.py
  + set(GUDHI_PYTHON_MODULES_EXTRA "${GUDHI_PYTHON_MODULES_EXTRA}'sktda', ")
  set(GUDHI_PYTHON_MODULES_EXTRA "${GUDHI_PYTHON_MODULES_EXTRA}'wasserstein', ")
  add_gudhi_debug_info("Python version ${PYTHON_VERSION_STRING}")
  @@ -69,6 +69,7 @@ if(PYTHONINTERP_FOUND)
  endif()
  if(SKLEARN_FOUND)
  add_gudhi_debug_info("Scikit-learn version ${SKLEARN_VERSION}")
  + endif()
  if(OT_FOUND)
  add_gudhi_debug_info("POT version ${OT_VERSION}")
  endif()
  @@ -391,6 +392,7 @@ if(PYTHONINTERP_FOUND)
  if(MATPLOTLIB_FOUND)
  if(NUMPY_FOUND)
  if(SCIPY_FOUND)
  + if(SKLEARN_FOUND)
  if(OT_FOUND)
  if(NOT CGAL_WITH_EIGEN3_VERSION VERSION_LESS 4.11.0)
  set (GUDHI_SPHINX_MESSAGE "Generating API documentation with Sphinx in ${CMAKE_CURRENT_BINARY_DIR}/sphinx/")
  @@ -422,6 +424,10 @@ if(PYTHONINTERP_FOUND)
  message("++ Python documentation module will not be compiled because POT was not found")
  set(GUDHI_MISSING_MODULES ${GUDHI_MISSING_MODULES} "python-documentation" CACHE INTERNAL "GUDHI_MISSING_MODULES")
  endif(OT_FOUND)
  + else(SKLEARN_FOUND)
  + message("++ Python documentation module will not be compiled because scikit-learn was not found")
  + set(GUDHI_MISSING_MODULES ${GUDHI_MISSING_MODULES} "python-documentation" CACHE INTERNAL "GUDHI_MISSING_MODULES")
  + endif(SKLEARN_FOUND)
  else(SCIPY_FOUND)
  message("++ Python documentation module will not be compiled because scipy was not found")
  set(GUDHI_MISSING_MODULES ${GUDHI_MISSING_MODULES} "python-documentation" CACHE INTERNAL "GUDHI_MISSING_MODULES")
  