Delete inherited rimage/.github/ workflows yamllint and checkpatch

We already have these checks in sof.git so they don't need to be
migrated.

Signed-off-by: Marc Herbert <marc.herbert@intel.com>

tools/rimage/.github/workflows/pull-request.yml

@@ -1,42 +0,0 @@
----
-# SPDX-License-Identifier: BSD-3-Clause
-# Tools that can save round-trips to github and a lot of time:
-#
-# yamllint -f parsable this.yml
-# pip3 install ruamel.yaml.cmd
-# yaml merge-expand this.yml exp.yml && diff -w -u this.yml exp.yml
-#
-# github.com also has a powerful web editor that can be used without
-# committing.
-
-name: codestyle
-
-# yamllint disable-line rule:truthy
-on: [pull_request]
-
-jobs:
-  yamllint:
-    runs-on: ubuntu-22.04
-    steps:
-      - uses: actions/checkout@v2
-        with:
-          fetch-depth: 50
-          submodules: recursive
-
-      - name: run yamllint
-        run: yamllint .github/workflows/*.yml
-  checkpatch:
-    runs-on: ubuntu-22.04
-    steps:
-      - uses: actions/checkout@v3
-        with:
-          ref: ${{ github.event.pull_request.head.sha }}
-          fetch-depth: ${{ env.PR_FETCH_DEPTH }}
-
-      - name: install codespell
-        run: sudo apt update && sudo apt install -y codespell
-
-      - name: checkpatch.pl PR review
-        uses: webispy/checkpatch-action@v9
-        env:
-          CHECKPATCH_COMMAND: ./scripts/checkpatch.pl