removed extension 'sphinx_autodoc_typehints' due to failed guarded ty…

…pe import with xarray

docs/source/conf.py

@@ -52,7 +52,6 @@
     'sphinx.ext.coverage',
     'sphinx.ext.mathjax',
     'sphinx.ext.viewcode',
-    'sphinx_autodoc_typehints',
     'sphinxcontrib.programoutput',
     'sphinx_gallery.gen_gallery',
     'sphinx.ext.intersphinx',
@@ -130,6 +129,8 @@
     'download_all_examples': False,
     'default_thumb_file': f'{dir_}/_static/design/logo-solo.png',
     'min_reported_time': 10,
+    # Rerun stale examples even if their MD5 hash shows that the example did not change.
+    'run_stale_examples': True,
 
 }
 
@@ -276,11 +277,6 @@ def setup(app):
 napoleon_use_param = True
 napoleon_use_rtype = True
 
-# See https://stackoverflow.com/a/45565445/56887
-# Add xarray due to failed guarded type import with
-# ImportError("cannot import name 'DatetimeLike' from 'xarray.core.types'...)
-autodoc_mock_imports = ['_tkinter', 'xarray']
-
 rst_epilog = """
 .. include:: <s5defs.txt>
 """