travis CHANGE gcc7 no longer required
diff --git a/.travis.yml b/.travis.yml
index 35a362f..d0450c2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,14 +10,6 @@
       dist: trusty
       sudo: required
       compiler: gcc
-      addons:
-        apt:
-          sources:
-            - ubuntu-toolchain-r-test
-          packages:
-            - g++-7
-      env:
-        - MATRIX_EVAL="CC=gcc-7 && CXX=g++-7"
     - os: osx
       compiler: gcc
   allow_failures: