Delete unused workflows

.github/workflows/bump-date.yml

@@ -1,39 +0,0 @@
-#
-# bump-date.yml
-# Bump the distribution date
-#
-
-name: Bump Distribution Date
-
-on:
-  release:
-    branches:
-    - master
-    paths-ignore:
-    - config/**
-    - data/**
-    - docs/**
-    - '**/*.md'
-  #schedule:
-  #  - cron: '0 0 * * *'
-
-jobs:
-  bump_date:
-    name: Bump Distribution Date
-  
-    runs-on: ubuntu-latest
-
-    steps:
-
-    - uses: actions/checkout@master
-
-    - name: Bump Distribution Date
-      run: |
-        # Inline Bump Script
-        DIST=$( date +"%Y-%m-%d" )
-        eval "sed -E -i 's/(#define +STRING_DISTRIBUTION_DATE) .*$/\1 \"$DIST\"/g' Marlin/src/inc/Version.h" && \
-        git config user.name "${GITHUB_ACTOR}" && \
-        git config user.email "${GITHUB_ACTOR}@users.noreply.github.com" && \
-        git add . && \
-        git commit -m "[cron] Bump distribution date ($DIST)" && \
-        git push

.github/workflows/check-pr.yml

@@ -1,31 +0,0 @@
-#
-# check-pr.yml
-# Close PRs directed at release branches
-#
-
-name: PR Bad Target
-
-on:
-  pull_request:
-    branches:
-    - 2.0.x
-
-jobs:
-  bad_target:
-    name: PR Bad Target
-    if: github.repository == 'knutwurst/Marlin-2-0-x-Anycubic-i3-MEGA-S'
-
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: peter-evans/close-pull@v1
-      with:
-        delete-branch: false
-        comment: >
-          Thanks for your contribution! Unfortunately we can't accept PRs directed at release branches. We make patches to the bugfix branches and only later do we push them out as releases.
-
-          Please redo this PR starting with the `bugfix-2.0.x` branch and be careful to target `bugfix-2.0.x` when resubmitting the PR.
-
-          It may help to set your fork's default branch to `bugfix-2.0.x`.
-
-          See [this page](http://marlinfw.org/docs/development/getting_started_pull_requests.html) for full instructions.