Remove github wf build for jdk 18 EA as that has been replaced by the other EA build

.github/workflows/jdk-18-ea.yml

@@ -1,39 +0,0 @@
-
-name: JDK 18-ea
-
-on:
-  workflow_dispatch:
-  schedule:
-    - cron: '30 6 * * 1,3,5'
-
-jobs:
-  build:
-
-    runs-on: ${{ matrix.os }}
-    permissions:
-      contents: read
-      packages: write
-    strategy:
-      fail-fast: false
-      matrix:
-        java_version: [18-ea]
-        os: [ubuntu-latest]
-
-    steps:
-    - uses: actions/checkout@v2
-    - name: Set up Java
-      uses: actions/setup-java@v2
-      with:
-        java-version: ${{ matrix.java_version }}
-        distribution: 'zulu'
-    - name: Maven cache
-      uses: actions/cache@v2
-      env:
-        cache-name: maven-cache
-      with:
-        path:
-          ~/.m2
-        key: build-${{ env.cache-name }}
-    - name: Build with Maven
-      run: mvn -T 8 test
-

README.md

@@ -3,7 +3,6 @@
 [![Maven Central : ebean](https://maven-badges.herokuapp.com/maven-central/io.ebean/ebean/badge.svg)](https://maven-badges.herokuapp.com/maven-central/io.ebean/ebean)
 [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://github.com/ebean-orm/ebean/blob/master/LICENSE)
 [![Multi-JDK Build](https://github.com/ebean-orm/ebean/actions/workflows/multi-jdk-build.yml/badge.svg)](https://github.com/ebean-orm/ebean/actions/workflows/multi-jdk-build.yml)
-[![JDK 18-ea](https://github.com/ebean-orm/ebean/actions/workflows/jdk-18-ea.yml/badge.svg)](https://github.com/ebean-orm/ebean/actions/workflows/jdk-18-ea.yml)
 
 ##### Build with database platforms
 [![H2Database](https://github.com/ebean-orm/ebean/actions/workflows/h2database.yml/badge.svg)](https://github.com/ebean-orm/ebean/actions/workflows/h2database.yml)