Moved pyrvt import after mocked modules.

docs/conf.py

@@ -16,8 +16,6 @@
 import sys
 import os
 
-import pyrvt
-
 from unittest.mock import MagicMock
 
 # Mock modules for modules that depend on C
@@ -30,6 +28,8 @@ def __getattr__(cls, name):
                 'matplotlib', 'xlrd', 'xlwt', 'openpyxl']
 sys.modules.update((mod_name, Mock()) for mod_name in MOCK_MODULES)
 
+import pyrvt
+
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
 # documentation root, use os.path.abspath to make it absolute, like shown here.