Use Xcode Swift toolchain in CI

Author: tim-kos

.github/workflows/transloaditkit-ci.yml

@@ -2,18 +2,11 @@ name: CI
 on: [push, workflow_dispatch]
 jobs:
   build:
-    name: Swift ${{ matrix.swift }} on ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: ["macos-latest"]
-        swift: ["6.0.2"]
-    runs-on: ${{ matrix.os }}
+    name: Swift on macos-latest
+    runs-on: macos-latest
     steps:
       - name: Extract Branch Name
         run: echo "BRANCH=$(echo ${GITHUB_REF##*/})" >> $GITHUB_ENV
-      - uses: swift-actions/setup-swift@v2
-        with:
-          swift-version: ${{ matrix.swift }}
       - name: Get swift version
         run: swift --version
       - uses: actions/checkout@v2