docs: rm cloud_spltheme

Author: tony

doc/conf.py

@@ -11,7 +11,7 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 
-import sys, os, cloud_sptheme
+import sys, os
 
 sys.path.append(os.path.abspath('.'))
 sys.path.append(os.path.abspath('_themes'))