ENYO-287 Removed reference to layout/flex

Issue
---
deploy.json included reference to removed layout/flex library

Cause
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layout/flex library removed

Fix
---
Update deploy.json

Enyo-DCO-1.1-Signed-off-by: Roy Sutton <roy.sutton@lge.com>
Merge pull request #70 from enyojs/fix-stale-deploy-reference

ENYO-287 Removed reference to layout/flex (2.5.1)

Integrated-By: Aaron Tam (aaron.tam@lge.com)