Remove old circle config

circle.yml

-general:
-  branches:
-    ignore:
-      - gh-pages # list of branches to ignore
-machine:
-  java:
-    version: oraclejdk8
-  environment:
-    _JAVA_OPTIONS: "-Xms1024m -Xmx2048m"
-dependencies:
-  override:
-    - ./mvnw -s .settings.xml -U --fail-never dependency:go-offline || true
-test:
-  override:
-    - ./mvnw -s .settings.xml clean install org.jacoco:jacoco-maven-plugin:prepare-agent install -U -P sonar -nsu --batch-mode -Dmaven.test.redirectTestOutputToFile=true -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn
-  post:
-    - find . -type f -regex ".*/spring-cloud-*.*/target/*.*" | cpio -pdm $CIRCLE_ARTIFACTS
-    - mkdir -p $CIRCLE_TEST_REPORTS/junit/
-    - find . -type f -regex ".*/target/.*-reports/.*" -exec cp {} $CIRCLE_TEST_REPORTS/junit/ \;
-    - bash <(curl -s https://codecov.io/bash)
-
-notify:
-  webhooks:
-    # A list of hook hashes, containing the url field
-    # gitter hook
-    - url: https://webhooks.gitter.im/e/22e6bb4eb945dd61ba54