Remove obsolete Travis & Sonar workflows

.travis.yml

@@ -1,20 +0,0 @@
-language: cpp
-
-services:
-  - docker
-
-env:
-  matrix:
-    - FLAVOR=COMPANION
-    - FLAVOR=ARM9X
-    - FLAVOR=X9LITE
-    - FLAVOR=X7
-    - FLAVOR=XLITE
-    - FLAVOR=X9
-    - FLAVOR=COLORLCD
-
-before_install:
-  - docker pull ghcr.io/raphaelcoeffic/opentx-commit-tests
-
-script:
-  - docker run --rm --env FLAVOR=$FLAVOR -v $(pwd):/src ghcr.io/raphaelcoeffic/opentx-commit-tests

sonar-project.properties

@@ -1,9 +0,0 @@
-sonar.host.url = https://sonarcloud.io
-sonar.projectKey = OpenTX
-sonar.organization = opentx-github
-sonar.projectName = OpenTX
-sonar.projectVersion = 2.2
-sonar.sources = .
-sonar.exclusions = sound/**, build/**, radio/src/thirdparty/**
-sonar.cfamily.build-wrapper-output = bw_output
-