Remove Codecov

Codecov has shown to be flaky, and calculate the wrong diff, in
addition, it doesn't show coverage for integration tests, which
makes the coverage report not useful.

Removing it for now, while we look at alternatives.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Jenkinsfile

@@ -61,7 +61,6 @@ pipeline {
             }
           }
           steps {
-            withCredentials([string(credentialsId: '52af932f-f13f-429e-8467-e7ff8b965cdb', variable: 'CODECOV_TOKEN')]) {
             withGithubStatus('janky') {
               sh '''
                 # todo: include ip_vs in base image
@@ -77,7 +76,6 @@ pipeline {
                   -e DOCKER_GITCOMMIT=${GITCOMMIT} \
                   -e DOCKER_GRAPHDRIVER=vfs \
                   -e DOCKER_EXECDRIVER=native \
-                    -e CODECOV_TOKEN \
                   -e GIT_SHA1=${GIT_COMMIT} \
                   docker:$GITCOMMIT \
                   hack/ci/janky
@@ -89,7 +87,6 @@ pipeline {
               '''
             }
           }
-          }
           post {
             always {
               sh '''

hack/ci/janky

@@ -4,10 +4,6 @@ set -eu -o pipefail
 
 hack/validate/default
 hack/test/unit
-bash <(curl -s https://codecov.io/bash) \
-    -f coverage.txt \
-    -C "$GIT_SHA1" || \
-    echo 'Codecov failed to upload'
 
 hack/make.sh \
 	binary-daemon \