Rmeove travis CI hook

.. as we're using GHA now

.travis.yml

@@ -1,24 +0,0 @@
-language: perl
-dist: bionic
-perl:
-   - "5.26"
-addons:
-  apt:
-    packages:
-    - dnsutils
-    - jsonlint
-before_install:
-  - |
-    echo "Checking if a CI run is needed post commit: ${TRAVIS_COMMIT_RANGE}"
-    if ! git diff --name-only ${TRAVIS_COMMIT_RANGE} | grep -qvE '(\.md$)|(\.pem$)|(\.pdf$)|(\.html$)|^(LICENSE)|^(docs)|^(utils)|^(bin)|(Dockerfile)'
-    then
-      echo "No code was updated, not running the CI."
-      exit
-    fi
-install:
-  - cpanm --notest Test::More
-  - cpanm --notest Data::Dumper
-  - cpanm --notest JSON
-#  - cpanm JSON::Validator
-script:
-  - prove -v