Remove unused SonarQube configs and cache setup.

Cleaned up commented-out SonarQube configuration from `pom.xml` and removed redundant cache settings in `.gitlab-ci.yml`. This simplifies the build configuration and eliminates unused or unnecessary definitions.

.gitlab-ci.yml

@@ -43,10 +43,6 @@ on_commits:
     - echo "Running tests..."
     - cd ${GITLAB_CLONE_DIR}
     - mvn test
-  cache:
-    key: "${CI_JOB_NAME}"
-    paths:
-      - .maven-cache
   only:
     - /^feature.*$/
     - merge_request
@@ -59,12 +55,12 @@ sonarcloud_scan:
   image:
     name: sonarsource/sonar-scanner-cli:latest
     entrypoint: [ "" ]
-  cache:
-    key: "${CI_JOB_NAME}"
-    paths:
-      - .maven-cache
   script:
-    - sonar-scanner -Dsonar.projectKey=${SONAR_PROJECT_KEY} -Dsonar.organization=${SONAR_ORGANIZATION} -Dsonar.token=${SONAR_TOKEN} -Dsonar.exclusions=docs/** -Dsonar.java.binaries=target/classes
+    - sonar-scanner -Dsonar.projectKey=${SONAR_PROJECT_KEY} \
+      -Dsonar.organization=${SONAR_ORGANIZATION} \
+      -Dsonar.token=${SONAR_TOKEN} \
+      -Dsonar.exclusions=docs/** \
+      -Dsonar.java.binaries=target/classes
   only:
     - merge_requests
     - develop

pom.xml

@@ -21,13 +21,6 @@
         <project.build.sourceEncoding>${file.encoding}</project.build.sourceEncoding>
         <project.reporting.outputEncoding>${file.encoding}</project.reporting.outputEncoding>
 
-        <!-- sonarQube cloud  -->
-<!--        <sonar.organization>th-schwarz</sonar.organization>-->
-<!--        <sonar.host.url>https://sonarcloud.io</sonar.host.url>-->
-<!--        <sonar.sourceEncoding>${file.encoding}</sonar.sourceEncoding>-->
-<!--        <sonar.exclusions>docs/**/*</sonar.exclusions>-->
-<!--        <sonar.test.exclusions>src/test/java/**/*</sonar.test.exclusions>-->
-
         <!-- checkstyle -->
         <checkstyle.version>10.21.3</checkstyle.version>
         <checkstyle.plugin.version>3.6.0</checkstyle.plugin.version>