github/workflows: Remove old fuzzing check

This has bitrotten vs. the newer code upstream at oss-fuzz, involves
an expensive docker container build, and provides little value vs. the
newer fuzz.sh script that runs in the regular CI containers.

Let oss-fuzz handle the deep validation.  We should be using fuzzing
as a smoke test via the existing scripts.

Signed-off-by: Andy Ross <andyross@google.com>

Author: andyross

.github/workflows/ipc_fuzzer.yml

@@ -10,39 +10,6 @@ on: [pull_request, workflow_dispatch]
 
 jobs:
 
-
-  # For the actual fuzzer see tools/oss-fuzz/README.
-  # also see
-  # https://google.github.io/oss-fuzz/getting-started/continuous-integration/
-  #
-  # Build and run fuzzer for 5s just to check that it runs properly. If it
-  # consistently fails in under 5s you probably did something wrong
-
-  # If you came here to quickly copy/paste the invocation of some build
-  # script in order to reproduce a failure reported by github then you
-  # will be disappointed by the Github Action below: it's magical. For a
-  # thorough reproduction you must follow the links above. For a quick,
-  # dirty and incomplete reproduction hack you can try the following two
-  # lines. Don't do this at home.
-  #
-  #   OUT=unused_dir  cmake -B oss-fuzz-build/ -S tools/oss-fuzz/
-  #   make -j -C oss-fuzz-build sof_ep fuzz_ipc.o
-  ipc-fuzzer-build:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Build Fuzzers
-        uses: google/oss-fuzz/infra/cifuzz/actions/build_fuzzers@master
-        with:
-          oss-fuzz-project-name: 'sound-open-firmware'
-
-      - name: Run Fuzzers
-        uses: google/oss-fuzz/infra/cifuzz/actions/run_fuzzers@master
-        with:
-          oss-fuzz-project-name: 'sound-open-firmware'
-          language: c
-          fuzz-seconds: 5
-
-  # Newer fuzzer
   simple-IPC-fuzz_sh:
     runs-on: ubuntu-22.04
     strategy: