patch 8.1.0299: misplaced comment

Problem:    misplaced comment
Solution:   Remove comment
diff --git a/src/testdir/runtest.vim b/src/testdir/runtest.vim
index fa621f4..c341491 100644
--- a/src/testdir/runtest.vim
+++ b/src/testdir/runtest.vim
@@ -272,7 +272,7 @@
       \ 'Test_paused()',
       \ 'Test_pipe_through_sort_all()',
       \ 'Test_pipe_through_sort_some()',
-      \ 'Test_popup_and_window_resize()',  " sometimes fails on Mac
+      \ 'Test_popup_and_window_resize()',
       \ 'Test_quoteplus()',
       \ 'Test_quotestar()',
       \ 'Test_reltime()',