Index: parallel-20191022/src/parallel
===================================================================
--- parallel-20191022.orig/src/parallel
+++ parallel-20191022/src/parallel
@@ -1949,7 +1949,7 @@ sub parse_options(@) {
     #
     # If you want GNU Parallel to be maintained in the future keep
     # this line.
-    citation_notice();
+    #citation_notice();
     # Seriously: YOU will be harming free software by removing the
     # notice.  You make it harder to justify spending time developing
     # it. If you *do* remove the line, please email
Index: parallel-20191022/src/sem
===================================================================
--- parallel-20191022.orig/src/sem
+++ parallel-20191022/src/sem
@@ -1949,7 +1949,7 @@ sub parse_options(@) {
     #
     # If you want GNU Parallel to be maintained in the future keep
     # this line.
-    citation_notice();
+    #citation_notice();
     # Seriously: YOU will be harming free software by removing the
     # notice.  You make it harder to justify spending time developing
     # it. If you *do* remove the line, please email