travis: remove crap

No longer open.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>

.travis.yml

@@ -1,20 +0,0 @@
-dist: xenial
-language: minimal
-
-cache:
-  directories:
-    - $HOME/.cache/git-remote-hg
-
-script:
-  - ./tools/check-versions hg:$HG_VERSION
-
-matrix:
-  include:
-    - env:
-    - env: HG_VERSION=@
-    - env: HG_VERSION=5.0
-    - env: HG_VERSION=4.9
-    - env: HG_VERSION=4.8
-    - env: HG_VERSION=4.7
-    - env: HG_VERSION=4.6
-    - env: HG_VERSION=4.5