Remove the integrationTest task from the Gradle integrationtest project

This task adds no additional configuration over the regular test task.

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1886961 13f79535-47bb-0310-9956-ffa450edef68

build.gradle

@@ -425,11 +425,6 @@ project('integrationtest') {
         exclude '**/*FileHandler.class'
     }
 
-    task integrationTest(type: Test) {
-        // these are just tests used during development of more test-code
-        exclude '**/*FileHandler.class'
-    }
-
     japicmp.enabled = false
 }