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/testdir/test_quickfix.vim b/src/testdir/test_quickfix.vim
index b5d0c1b..c77f3c9 100644
--- a/src/testdir/test_quickfix.vim
+++ b/src/testdir/test_quickfix.vim
@@ -2022,15 +2022,3 @@
   call XfreeTests('c')
   call XfreeTests('l')
 endfunc
-
-func Test_no_reuse_mem()
-  set efm=E,%W%m,
-  cgetexpr ['C']
-  set efm=%C%m
-  lexpr '0'
-  lopen
-  call setqflist([], 'r')
-  caddbuf
-
-  set efm&
-endfunc
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,