removing dep on outbreaks from github

thibautjombart · thibautjombart · commit 669d32cd314b · 2016-10-31T16:05:15.000Z
diff --git a/.travis.yml b/.travis.yml
@@ -1,7 +1,6 @@
 language: r
 cache: packages
 warnings_are_errors: true
-r_github_packages: reconhub/outbreaks
 r_github_packages: hadley/ggplot2
 
 after_success:
