qa/distros: remove duplicate centos_8.stream.yaml from supported

Signed-off-by: Casey Bodley <cbodley@redhat.com>

diff --git a/qa/distros/supported-all-distro/centos_8.stream.yaml b/qa/distros/supported-all-distro/centos_8.stream.yaml
deleted file mode 120000 (symlink)
index e96091b..0000000
--- a/qa/distros/supported-all-distro/centos_8.stream.yaml
+++ /dev/null
@@ -1 +0,0 @@
-../all/centos_8.stream.yaml
\ No newline at end of file

diff --git a/qa/distros/supported-random-distro$/centos_8.stream.yaml b/qa/distros/supported-random-distro$/centos_8.stream.yaml
deleted file mode 120000 (symlink)
index e96091b..0000000
--- a/qa/distros/supported-random-distro$/centos_8.stream.yaml
+++ /dev/null
@@ -1 +0,0 @@
-../all/centos_8.stream.yaml
\ No newline at end of file

diff --git a/qa/distros/supported/centos_8.stream.yaml b/qa/distros/supported/centos_8.stream.yaml
deleted file mode 120000 (symlink)
index e96091b..0000000
--- a/qa/distros/supported/centos_8.stream.yaml
+++ /dev/null
@@ -1 +0,0 @@
-../all/centos_8.stream.yaml
\ No newline at end of file