travis: don't test on go1.7 as it fails the math tests

ncw · ncw · commit c0de7de6313f · 2018-08-05T15:03:48.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -4,7 +4,6 @@ dist: trusty
 os:
 - linux
 go:
-- 1.7.6
 - 1.8.7
 - 1.9.3
 - "1.10.1"

-Original file line number
+Diff line change
 os:
 - linux
 go:
 -- 1.7.6
 - 1.8.7
 - 1.9.3
 - "1.10.1"