removed 1.6 from travis.yml
diff --git a/.travis.yml b/.travis.yml
index 1edbcbe..8ed1e44 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,6 @@
 language: go
 go:
   - 1.5
-  - 1.6
   - 1.6.2
   - stable