Update README.md

Remove link to travis-ci

README.md

@@ -34,8 +34,6 @@ To use the aggregation filter, add `51-filter-postfix-aggregate.conf` to `/etc/l
 Tests
 -----
 
-[![Build Status](https://travis-ci.org/whyscream/postfix-grok-patterns.svg?branch=master)](https://travis-ci.org/whyscream/postfix-grok-patterns)
-
 In the `test/` directory, there is a test suite that tries to make sure that no previously supported log line will break because of changing common patterns and such. It also returns results a lot faster than doing `sudo service logstash restart` :-).
 
 The test suite needs the patterns provided by Logstash, you can easily pull these from github by running `git submodule update --init`. To run the test suite, you also need `ruby 2.2` or higher, and the `jls-grok` and `minitest` gems. Then simply execute `ruby test/test.rb`.