Supprime un `print` oublié #480

Job	Run time
Lint and build front-end	1m 6s
Build Sphinx documentation	1m 2s
Lint	36s
Install and test zds-site (zds.tutorialv2)	7m 34s
Install and test zds-site (zds.member zds.gallery zds.searchv2 zds.middlewares zds.pages)	3m 41s
Install and test zds-site (zds.forum zds.featured zds.mp zds.notification zds.utils)	4m 40s
Push coverage to Coveralls	13s
Push documentation to GitHub Pages	0s
	18m 52s

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