Removed GitHub action for sending Slack notifications to Partner Engineering channel, since we're no longer working with the repo. (#235)

.github/workflows/slack-notify-issues.yml

@@ -1,20 +0,0 @@
-on:
-  issues:
-    types: [opened, reopened, deleted, closed]
-name: Slack Issue Notification
-jobs:
-  slackNotification:
-    name: Slack Notification Issue
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-      - name: Slack Notification Issue
-        uses: rtCamp/action-slack-notify@master
-        env:
-          SLACK_CHANNEL: partnereng-issues
-          SLACK_COLOR: '#00A86B'
-          SLACK_ICON: https://pbs.twimg.com/profile_images/978188446178082817/86ulJdF0.jpg
-          SLACK_TITLE: "[${{ github.event.issue.state}}] ${{ github.event.issue.title }} on ${{ github.repository }} :rocket:"
-          SLACK_MESSAGE: 'Link: ${{ github.event.issue.url }}'
-          SLACK_USERNAME: PartnerEngineers
-          SLACK_WEBHOOK: ${{ secrets.SLACK_ISSUE_WEBHOOK }}

.github/workflows/slack-notify-pr.yml

@@ -1,22 +0,0 @@
-on:
-  pull_request:
-    branches:
-      - master
-    types: [opened, reopened, closed]
-name: Slack Pull Request Notification
-jobs:
-  slackNotification:
-    name: Slack Notification PR
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-      - name: Slack Notification PR
-        uses: rtCamp/action-slack-notify@master
-        env:
-          SLACK_CHANNEL: partnereng-pullrequest
-          SLACK_COLOR: '#00A86B'
-          SLACK_ICON: https://pbs.twimg.com/profile_images/978188446178082817/86ulJdF0.jpg
-          SLACK_TITLE: "[${{ github.event.pull_request.state}}] ${{ github.event.pull_request.title }} on ${{ github.repository }} :rocket:"
-          SLACK_MESSAGE: 'Merging from ${{ github.head_ref }} to ${{ github.base_ref }} by ${{ github.actor }}. Link: ${{ github.event.pull_request._links.html.href }}'
-          SLACK_USERNAME: PartnerEngineers
-          SLACK_WEBHOOK: ${{ secrets.SLACK_PR_WEBHOOK }}