don't run Swift 5.0 tests on Linux

.github/workflows/Tests.yml

@@ -3,39 +3,6 @@ name: Tests
 on: [push, pull_request]
 
 jobs:
-    linux-50:
-        name: Linux (Swift 5.0)
-        runs-on: ubuntu-latest
-        container: swift:5.0
-        steps:
-        - name: Checkout
-          uses: actions/checkout@v1
-        - name: Swift Version
-          run: swift --version
-        - name: Make Logs Directory
-          run: mkdir logs
-        - name: Build (Debug)
-          run: swift build -v -c debug
-        - name: Build (Release)
-          run: swift build -v -c release
-        - name: Test (Debug)
-          run: swift test -v -c debug 
-        - name: Test (Release)
-          run: swift test -v -c release -Xswiftc -enable-testing
-        - name: Upload Logs
-          uses: actions/upload-artifact@v1
-          with:
-            name: logs
-            path: logs
-        - name: Slack Notification
-          uses: elegantchaos/slatify@master
-          if: always()
-          with:
-            type: ${{ job.status }}
-            job_name: 'Linux (Swift 5.0)'
-            mention_if: 'failure'
-            url: ${{ secrets.SLACK_WEBHOOK }}
-
     linux-51:
         name: Linux (Swift 5.1)
         runs-on: ubuntu-latest