Remove Travis integration, since GYP is now idle.

Change-Id: I09bcd81f961d8d69a6712470ffc84cea81ed76ad
Reviewed-on: https://chromium-review.googlesource.com/c/external/gyp/+/3131841
Reviewed-by: Michael Moss <mmoss@chromium.org>
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 4733130..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,23 +0,0 @@
-language: cpp
-matrix:
-  include:
-    - os: linux
-      compiler: clang
-    - os: osx
-      compiler: clang
-    - python: 2.7
-      language: python
-      before_install: pip install flake8
-      script: flake8 . --count --select=E901,E999,F821,F822,F823 --show-source --statistics
-    - python: 3.7
-      language: python
-      before_install: pip install flake8
-      script: flake8 . --count --select=E901,E999,F821,F822,F823 --show-source --statistics
-      dist: xenial # required for Python >= 3.7 (travis-ci/travis-ci#9069)
-
-before_install: ./buildbot/travis-checkout.sh
-script: ./buildbot/travis-test.sh
-
-branches:
-  only:
-  - master