chore(travis): remove obsolete node 4.1

wzrdtales · wzrdtales · commit d281bf16d0ba · 2016-04-17T11:26:17.000+02:00
Keep 4.2 lts and node 4 in the build which is usually enough.
diff --git a/.travis.yml b/.travis.yml
@@ -4,7 +4,6 @@ node_js:
   - 0.10
   - 0.12
   - 4.0
-  - 4.1
   - 4.2
   - 5
   - "iojs-1"

-Original file line number
+Diff line change
   - 0.10
   - 0.12
   - 4.0
 -  - 4.1
   - 4.2
   - 5
   - "iojs-1"