chore(ci): drop build discord noficiation

No longer necessary due to fleet decomissioning:
https://github.com/status-im/infra-go-waku/issues/18

Signed-off-by: Jakub Sokołowski <jakub@status.im>

ci/Jenkinsfile.docker

@@ -66,55 +66,10 @@ pipeline {
     }
   }
   post {
-    success { script {
-      discordNotify(
-        header: 'Go-Waku build successful!',
-        cred: 'discord-waku-deployments-webhook',
-      )
-    } }
     always { cleanWs() }
   }
 }
 
-def discordNotify(Map args=[:]) {
-  def opts = [
-    header: args.header ?: 'Deployment successful!',
-    cred: args.cred ?: null,
-  ]
-  def repo = [
-    url: GIT_URL.minus('.git'),
-    branch: GIT_BRANCH.minus('origin/'),
-    commit: GIT_COMMIT.take(8),
-    prev: (
-      env.GIT_PREVIOUS_SUCCESSFUL_COMMIT ?: env.GIT_PREVIOUS_COMMIT ?: 'master'
-    ).take(8),
-  ]
-  wrap([$class: 'BuildUser']) {
-    BUILD_USER_ID = env.BUILD_USER_ID
-  }
-  withCredentials([
-    string(
-      credentialsId: opts.cred,
-      variable: 'DISCORD_WEBHOOK',
-    ),
-  ]) {
-    discordSend(
-      link: env.BUILD_URL,
-      result: currentBuild.currentResult,
-      webhookURL: env.DISCORD_WEBHOOK,
-      title: "${env.JOB_NAME}#${env.BUILD_NUMBER}",
-      description: """
-        ${opts.header}
-        Image: [`${IMAGE_NAME}:${IMAGE_TAG}`](https://hub.docker.com/r/${IMAGE_NAME}/tags?name=${IMAGE_TAG})
-        Branch: [`${repo.branch}`](${repo.url}/commits/${repo.branch})
-        Commit: [`${repo.commit}`](${repo.url}/commit/${repo.commit})
-        Diff: [`${repo.prev}...${repo.commit}`](${repo.url}/compare/${repo.prev}...${repo.commit})
-        By: [`${BUILD_USER_ID}`](${repo.url}/commits?author=${BUILD_USER_ID})
-      """,
-    )
-  }
-}
-
 def getDefaultImageTag(currentValue) {
   switch (env.JOB_BASE_NAME) {
     case 'docker-latest':  return 'latest'