Merge pull request scikit-learn#5025 from jakirkham/fix_typo

DOC: Remove extra "not"

Author: agramfort

doc/modules/calibration.rst

@@ -10,7 +10,7 @@ Probability calibration
 When performing classification you often want not only to predict the class
 label, but also obtain a probability of the respective label. This probability
 gives you some kind of confidence on the prediction. Some models can give you
-poor estimates of the class probabilities and some even do not not support
+poor estimates of the class probabilities and some even do not support
 probability prediction. The calibration module allows you to better calibrate
 the probabilities of a given model, or to add support for probability
 prediction.