remove xbuild as it does not work properly

.travis.yml

@@ -10,11 +10,11 @@ before_install:
 install:
  - sudo apt-get install mono-gmcs cli-common-dev libsdl1.2debian libgl1-mesa-glx libopenal1 libfreetype6
 
-# Run the build script which will automatically call RALint and ensure that the IDE project files are still valid.
+# Run the build script and call RALint to check for YAML errors
 script:
  - make all
+after_script:
  - make test
- - xbuild
 
 # Only watch the development branch.
 branches:
@@ -29,4 +29,4 @@ notifications:
     channels:
       - "irc.freenode.net#openra"
     use_notice: true
-    skip_join: true
+    skip_join: true