Exclude Python2.6 from Django1.8 tests.

Author: Surgo

.travis.yml

@@ -46,9 +46,7 @@ matrix:
     - python: "2.6"
       env: DJANGO="django>=1.7.0,<1.8.0"
     - python: "2.6"
-      env: DJANGO="django>=1.7.0,<1.8.0"
-    - python: "2.6"
-      env: DJANGO="https://github.com/django/django/archive/master.tar.gz"
+      env: DJANGO="django>=1.8.0,<1.9.0"
     - python: "2.6"
       env: DJANGO="https://github.com/django/django/archive/master.tar.gz"
   allow_failures: