removing one line

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@276344 13f79535-47bb-0310-9956-ffa450edef68

src/etc/testcases/types/assertions.xml

@@ -160,7 +160,7 @@
         <path refid="assert.classpath"/>
       </classpath>
       <formatter type="plain"     usefile="false"/>
-      <assertions enablesystemassertions="true">
+      <assertions >
         <enable class="${test.classname}" />
       </assertions> 
       <test name="${test.classname}"/>