patch 8.0.0579: duplicate test case for quickfix

Problem:    Duplicate test case for quickfix.
Solution:   Remove the function. (Yegappan Lakshmanan)
diff --git a/src/version.c b/src/version.c
index 656a7cc..f7d0a78 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    579,
+/**/
     578,
 /**/
     577,