Revert https://codereview.chromium.org/1291903002 (protobuf roll).

third_party/protobuf/.travis.yml

Index: third_party/protobuf/.travis.yml
diff --git a/third_party/protobuf/.travis.yml b/third_party/protobuf/.travis.yml
deleted file mode 100644
index 4edf3b30e1e8d51cf3814be75998507721a69f5f..0000000000000000000000000000000000000000
--- a/third_party/protobuf/.travis.yml
+++ /dev/null
@@ -1,56 +0,0 @@
-sudo: required
-# Note: travis currently does not support listing more than one language so
-# this cheats and claims to only be cpp.  If they add multiple language
-# support, this should probably get updated to install steps and/or
-# rvm/gemfile/jdk/etc. entries rather than manually doing the work.
-language: cpp
-os:
-  - linux
-  - osx
-script:
-  - ./travis.sh $CONFIG
-env:
-  - CONFIG=cpp
-  - CONFIG=cpp_distcheck
-  - CONFIG=csharp
-  - CONFIG=java_jdk6
-  - CONFIG=java_jdk7
-  - CONFIG=java_oracle7
-  - CONFIG=javanano_jdk6
-  - CONFIG=javanano_jdk7
-  - CONFIG=javanano_oracle7
-  - CONFIG=python
-  - CONFIG=python_cpp
-  - CONFIG=ruby19
-  - CONFIG=ruby20
-  - CONFIG=ruby21
-  - CONFIG=ruby22
-  - CONFIG=jruby
-matrix:
-  exclude:
-    # It's nontrivial to programmatically install a new JDK from the command
-    # line on OS X, so we rely on testing on Linux for Java code.
-    - os: osx
-      env: CONFIG=java_jdk6
-    - os: osx
-      env: CONFIG=java_jdk7
-    - os: osx
-      env: CONFIG=java_oracle7
-    - os: osx
-      env: CONFIG=javanano_jdk6
-    - os: osx
-      env: CONFIG=javanano_jdk7
-    - os: osx
-      env: CONFIG=javanano_oracle7
-    # Requires installing mono, currently travis.sh is doing that with apt-get
-    # which doesn't work on OS X.
-    - os: osx
-      env: CONFIG=csharp
-  allow_failures:
-    # These currently do not work on OS X but are being worked on by @haberman.
-    - os: osx
-      env: CONFIG=ruby22
-    - os: osx
-      env: CONFIG=jruby
-notifications:
-  email: false