qa: remove unused distro dir

Mistakenly added by affaae045f4ce090ea614b693e47d47bdf9b7c95.

Signed-off-by: Patrick Donnelly <pdonnell@redhat.com>

diff --git a/qa/suites/fs/upgrade/supported-random-distros$ b/qa/suites/fs/upgrade/supported-random-distros$
deleted file mode 120000 (symlink)
index 0862b44..0000000
--- a/qa/suites/fs/upgrade/supported-random-distros$
+++ /dev/null
@@ -1 +0,0 @@
-.qa/distros/supported-random-distro$
\ No newline at end of file