[DOC] Remove wip_plot_spin_test.py from rendering

For now. Need to update that once we have a better idea of what to
recommend

Author: rmarkello

docs/conf.py

@@ -118,5 +118,6 @@
     'reference_url': {
         'netneurotools': None
     },
-    'thumbnail_size': (250, 250)
+    'thumbnail_size': (250, 250),
+    'ignore_pattern': r'/wip.*\.py',
 }