Removed unneeded StdDev.convert_value() and Variance.convert_value().
Removed unneeded StdDev.convert_value() and Variance.convert_value().

Seems unneeded since its introduction in
f59fd15c4928caf3dfcbd50f6ab47be409a43b01.
monetate/django,jpic/django,fenginx/django,ebar0n/django,elena/django,edmorley/django,elky/django,piquadrat/django,shaib/django,shacker/django,monetate/django,manhhomienbienthuy/django,frankvdp/django,treyhunner/django,felixxm/django,elky/django,dracos/django,elky/django,edmorley/django,freakboy3742/django,monetate/django,piquadrat/django,atul-bhouraskar/django,timgraham/django,apollo13/django,treyhunner/django,charettes/django,googleinterns/django,manhhomienbienthuy/django,ghickman/django,schinckel/django,auvipy/django,pauloxnet/django,django/django,theo-l/django,solarissmoke/django,schinckel/django,reinout/django,georgemarshall/django,timgraham/django,kaedroho/django,dracos/django,elena/django,jpic/django,ghickman/django,claudep/django,blighj/django,ghickman/django,blighj/django,charettes/django,EmadMokhtar/Django,reinout/django,fenginx/django,shaib/django,adamchainz/django,elena/django,wkschwartz/django,claudep/django,blighj/django,reinout/django,MarkusH/django,treyhunner/django,ebar0n/django,dsanders11/django,theo-l/django,koordinates/django,blighj/django,monetate/django,frankvdp/django,pauloxnet/django,reinout/django,apollo13/django,timgraham/django,atul-bhouraskar/django,uranusjr/django,simonw/django,timgraham/django,frankvdp/django,solarissmoke/django,felixxm/django,treyhunner/django,freakboy3742/django,takis/django,solarissmoke/django,kaedroho/django,claudep/django,ebar0n/django,kaedroho/django,elky/django,uranusjr/django,claudep/django,manhhomienbienthuy/django,auvipy/django,takis/django,rsalmaso/django,rsalmaso/django,georgemarshall/django,fenginx/django,simonw/django,charettes/django,MarkusH/django,adamchainz/django,solarissmoke/django,elena/django,EmadMokhtar/Django,georgemarshall/django,georgemarshall/django,dracos/django,apollo13/django,shaib/django,rsalmaso/django,takis/django,schinckel/django,simonw/django,pauloxnet/django,simonw/django,fenginx/django,ghickman/django,django/django,takis/django,dracos/django,django/django,uranusjr/django,piquadrat/django,MarkusH/django,googleinterns/django,felixxm/django,adamchainz/django,felixxm/django,edmorley/django,uranusjr/django,dsanders11/django,wkschwartz/django,rsalmaso/django,auvipy/django,koordinates/django,charettes/django,shacker/django,ebar0n/django,apollo13/django,googleinterns/django,pauloxnet/django,shaib/django,edmorley/django,jpic/django,manhhomienbienthuy/django,atul-bhouraskar/django,theo-l/django,jpic/django,adamchainz/django,dsanders11/django,koordinates/django,wkschwartz/django,freakboy3742/django,googleinterns/django,piquadrat/django,django/django,shacker/django,EmadMokhtar/Django,frankvdp/django,atul-bhouraskar/django,auvipy/django,koordinates/django,MarkusH/django,wkschwartz/django,shacker/django,dsanders11/django,schinckel/django,theo-l/django