Back off Travis build to default dist

Travis appears to have deployed a testing xenial environment which
runs a daemon that sometimes interferes with apt commands.  Remove the
"dist: xenial" line so we run in the default, supported distribution
(currently trusty).

diff --git a/.travis.yml b/.travis.yml
index ec170eda02b9a6e13a4963d1d84807953e169915..eb4803646a694f6f736933b1d26e04c925e8c1af 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,8 +2,6 @@ language: c++
 
 sudo: required
 
-dist: xenial
-
 matrix:
   include:
   - compiler: clang