Revert "RuntimeUtils#invokedSingleTest"

This reverts commit 21d47f92

assira/src/main/java/net/ranides/assira/system/RuntimeUtils.java

@@ -97,14 +97,4 @@ public final class RuntimeUtils {
         }
     }
 
-    public static boolean invokedSingleTest() {
-        return Li.SINGLE_TEST;
-    }
-
-    private static final class Li { // NOPMD lazy init idiom
-
-        private static final boolean SINGLE_TEST = RuntimeUtils.getProperty("test") != null;
-
-    }
-
 }