Remove libsoup automated test case

There is no benefit to execute this unit test in LAVA and it is already
being executed in OBS during package build time.

Signed-off-by: Luis Araujo <luis.araujo@collabora.co.uk>

test-cases/libsoup-unit.yaml

-metadata:
-  name: libsoup-unit
-  format: "Apertis Test Definition 1.0"
-  image-types:
-    minimal: [ armhf-internal, armhf, arm64, amd64 ]
-    target:  [ armhf-internal, amd64 ]
-    basesdk: [ amd64 ]
-    sdk:     [ amd64 ]
-  image-deployment:
-    - APT
-  type: unit
-  exec-type: automated
-  priority: low
-  maintainer: "Apertis Project"
-  description: "Run the unit tests that ship with the library against the running
-                system."
-
-  expected:
-    - "PASSED or FAILED"
-
-install:
-  deps:
-    - libsoup2.4-tests
-    - curl
-  git-repos:
-    - url: https://gitlab.apertis.org/infrastructure/apertis-tests.git
-      branch: 'apertis/v2019dev0'
-
-run:
-  steps:
-    - "# Enter test directory:"
-    - cd apertis-tests
-    - "# Execute the following command:"
-    - common/run-test-in-systemd --name=run-test --timeout=900 env DEBUG=2 libsoup/automated/run-test.sh
-
-parse:
-  pattern: ^(?P<test_case_id>[a-zA-Z0-9_\-\./]+):\s*(?P<result>pass|fail|skip|unknown)$