don't do double builds for gemstone

Johan Brichau · Johan Brichau · commit db033f9581fb · 2017-09-09T13:15:53.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -9,9 +9,6 @@ smalltalk:
   - Pharo-3.0
   - Squeak-trunk
   - Squeak-5.1
-  - GemStone-3.1.0.6
-  - GemStone-3.2.16
-  - GemStone-3.3.4
 
 matrix:
   allow_failures:
