delete virtuoso versions with issues

Author: shinobu

.travis.yml

@@ -8,21 +8,20 @@ php:
 
 env:
     - VIRTUOSO=6.1.7
-    - VIRTUOSO=7.1.0
-    - VIRTUOSO=7.2.4.2
+    - VIRTUOSO=7.0.0
+    - VIRTUOSO=7.2.0
 
 matrix:
     fast_finish: true
     include:
-        - php: 5.4
-          env: VIRTUOSO=6.1.4
         - php: 5.4
           env: VIRTUOSO=6.1.6
         - php: 5.4
-          env: VIRTUOSO=7.2.0
+          env: VIRTUOSO=7.2.4.2
     allow_failures:
         - php: 7.0
         - php: 7.1
+        - env: VIRTUOSO=7.2.4.2
 
 cache:
     directories: