drop hhvm test as hhvm diverged and no longer works

dbu · dbu · commit c251571ba194 · 2018-12-02T18:11:03.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -11,7 +11,6 @@ php:
     - 5.6
     - 7.0
     - 7.1
-    - hhvm
 
 env:
     global:

-Original file line number
+Diff line change
     - 5.6
     - 7.0
     - 7.1
 -    - hhvm
 env:
     global: