ENH: ignore -noFunctionObjects option when disabled

- With argList::noFunctionObjects() we use the logic added in
  4b93333292 (issue #352)

  By removing the '-noFunctionObjects' option, we automatically
  suppress the creation of function-objects via Time (with argList
  as a parameter).
  There is generally no need in these cases for an additional

      runTime.functionObjects().off()  statement

  Use the argList::noFunctionObjects() for more direct configuration
  and reduce unnecessary clutter in the -help information.

  In previous versions, the -noFunctionObjects would have been redundant
  anyhow, so we can also just ignore it now instead.

applications/utilities/surface/surfaceFeatureExtract/surfaceFeatureExtract.C

@@ -207,10 +207,12 @@ int main(int argc, char *argv[])
 {
     argList::addNote
     (
-        "Extract and write surface features to file"
+        "Extract and write surface feature lines to file.\n"
+        "Feature line extraction only valid on closed manifold surfaces."
     );
+
     argList::noParallel();
-    argList::noFunctionObjects();
+    argList::noFunctionObjects();  // Never use function objects
 
     argList::addOption
     (