Remove unused CI files

ci/scripts/build-pr-project.sh

@@ -1,8 +0,0 @@
-#!/bin/bash
-set -e
-
-source $(dirname $0)/common.sh
-
-pushd git-repo > /dev/null
-./gradlew -Dorg.gradle.internal.launcher.welcomeMessageEnabled=false --no-daemon --max-workers=4 --continue build
-popd > /dev/null

ci/tasks/build-pr-project.yml

@@ -1,13 +0,0 @@
----
-platform: linux
-inputs:
-- name: git-repo
-outputs:
-- name: distribution-repository
-caches:
-- path: gradle
-params:
-  CI: true
-  GRADLE_ENTERPRISE_URL: https://ge.spring.io
-run:
-  path: git-repo/ci/scripts/build-pr-project.sh