Supprime un `print` oublié #2078

Job	Run time
Lint and build front-end	37s
Build Sphinx documentation	58s
Lint	25s
Install and test zds-site (zds.tutorialv2)	6m 12s
Install and test zds-site (zds.member zds.gallery zds.searchv2 zds.middlewares zds.pages)	3m 11s
Install and test zds-site (zds.forum zds.featured zds.mp zds.notification zds.utils)	3m 57s
Push documentation to GitHub Pages	9s
Push coverage to Coveralls	9s
	15m 38s

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