Remove stale QNN static llama eval job (#20884)

Summary:
- Remove the `test-static-llama-qnn-eval-linux` trunk workflow job.
- Delete `.ci/scripts/test_qnn_static_llama_eval.sh`, which only called
the deleted
`executorch.examples.qualcomm.oss_scripts.llama.eval_llama_qnn`
entrypoint.
- Existing QNN/static LLM coverage remains on the current `llama.py`
path via `test_qnn_static_llm.sh` and
`TestExampleLLMScript.test_static_llm_model`.

Context:
- Trunk job `test-static-llama-qnn-eval-linux (baseline, 62) /
linux-job` is failing with `No module named
executorch.examples.qualcomm.oss_scripts.llama.eval_llama_qnn`.

Test Plan:
- `grep -RIn
"test_qnn_static_llama_eval.sh\|eval_llama_qnn\|static-llama-qnn-eval"
.github .ci examples backends` returns no matches.
- `git diff --check`

Notes:
- Local YAML parse check was not run because PyYAML is not installed in
this environment.
- Commit hook skipped lintrunner because lintrunner is not installed
locally.

Author: JacobSzwejbka

.ci/scripts/test_qnn_static_llama_eval.sh

@@ -997,44 +997,6 @@ jobs:
               - 'examples/qualcomm/**'
               - 'examples/models/llama/**'
 
-  test-static-llama-qnn-eval-linux:
-    needs: changes # has dependency on changes jobs defined above
-    if: needs.changes.outputs.qnn == 'true'
-    name: test-static-llama-qnn-eval-linux
-    uses: pytorch/test-infra/.github/workflows/linux_job_v2.yml@main
-    permissions:
-      id-token: write
-      contents: read
-    strategy:
-      fail-fast: false
-      matrix:
-        config:
-          - name: "baseline"
-            flags: ""
-            threshold: 62.0
-    with:
-      runner: linux.2xlarge
-      docker-image: ci-image:executorch-ubuntu-22.04-qnn-sdk
-      submodules: 'recursive'
-      ref: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || github.sha }}
-      timeout: 180
-      script: |
-        # The generic Linux job chooses to use base env, not the one setup by the image
-        CONDA_ENV=$(conda env list --json | jq -r ".envs | .[-1]")
-        conda activate "${CONDA_ENV}"
-        BUILD_TOOL="cmake"
-        PYTHON_EXECUTABLE=python bash .ci/scripts/setup-qnn-deps.sh
-        PYTHON_EXECUTABLE=python bash .ci/scripts/build-qnn-sdk.sh
-        # Setup executorch
-        PYTHON_EXECUTABLE=python bash .ci/scripts/setup-linux.sh --build-tool "${BUILD_TOOL}"
-        # Setup install_requirements for llama
-        PYTHON_EXECUTABLE=python bash examples/models/llama/install_requirements.sh
-
-        echo ">>> Running config: ${{ matrix.config.name }}"
-        PYTHON_EXECUTABLE=python bash .ci/scripts/test_qnn_static_llama_eval.sh \
-          --flags "${{ matrix.config.flags }}" \
-          --threshold "${{ matrix.config.threshold }}"
-
   unittest-release:
     uses: ./.github/workflows/_unittest.yml
     permissions: