removing unnecessary ubuntu distros

diff --git a/qa/suites/rados/thrash-erasure-code-big/supported-random-distro$ b/qa/suites/rados/thrash-erasure-code-big/supported-random-distro$
deleted file mode 120000 (symlink)
index 7cef21e..0000000
--- a/qa/suites/rados/thrash-erasure-code-big/supported-random-distro$
+++ /dev/null
@@ -1 +0,0 @@
-../basic/supported-random-distro$
\ No newline at end of file

diff --git a/qa/suites/rados/thrash-old-clients/distro$/.qa b/qa/suites/rados/thrash-old-clients/distro$/.qa
deleted file mode 120000 (symlink)
index a602a03..0000000
--- a/qa/suites/rados/thrash-old-clients/distro$/.qa
+++ /dev/null
@@ -1 +0,0 @@
-../.qa/
\ No newline at end of file

diff --git a/qa/suites/rados/thrash-old-clients/distro$/centos_latest.yaml b/qa/suites/rados/thrash-old-clients/distro$/centos_latest.yaml
deleted file mode 120000 (symlink)
index bd9854e..0000000
--- a/qa/suites/rados/thrash-old-clients/distro$/centos_latest.yaml
+++ /dev/null
@@ -1 +0,0 @@
-.qa/distros/supported/centos_latest.yaml
\ No newline at end of file

diff --git a/qa/suites/rados/thrash-old-clients/distro$/ubuntu_16.04.yaml b/qa/suites/rados/thrash-old-clients/distro$/ubuntu_16.04.yaml
deleted file mode 120000 (symlink)
index 053d801..0000000
--- a/qa/suites/rados/thrash-old-clients/distro$/ubuntu_16.04.yaml
+++ /dev/null
@@ -1 +0,0 @@
-.qa/distros/all/ubuntu_16.04.yaml
\ No newline at end of file