Removed old gearman from travis

gearman-go and original gearmand don't play well, possibly an issue?

.travis.yml

@@ -5,4 +5,3 @@ go:
 before_install:
   - sudo apt-get remove -y gearman-job-server
   - sudo apt-get install -y gearman-job-server
-  - sudo apt-get install -y gearman-server