Remove deprecated STI test remains

tests/tests.yml

@@ -1,22 +0,0 @@
-# Tests for NetworkManager
-- hosts: localhost
-  roles:
-  - role: standard-test-basic
-    tags:
-    - classic
-    repositories:
-    - repo: "https://github.com/NetworkManager/NetworkManager-ci"
-      dest: "NetworkManager-ci"
-    tests:
-    - sanity-tests:
-        dir: NetworkManager-ci
-        run: run/osci/run-tests dnsmasq
-    environment:
-      LC_ALL: C.UTF-8
-  - role: standard-test-beakerlib
-    tags:
-    - classic
-    repositories:
-    - repo: "https://github.com/InfrastructureServices/dnsmasq-tests.git"
-      dest: "dnsmasq-tests"
-      fmf_filter: "tier: 1"