chore: remove the issue triaging agent

The agent ran on a schedule with a write-scoped GitHub token while feeding
attacker-controlled issue title and body straight into its prompt, so a
crafted issue could steer its labeling and owner-assignment actions.
Removing the agent and its workflow removes that exposure.

Co-authored-by: George Weale <gweale@google.com>
PiperOrigin-RevId: 941289396

.github/workflows/triage.yml

@@ -1,68 +0,0 @@
-# Copyright 2025 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-name: ADK Issue Triaging Agent
-
-on:
-  issues:
-    types: [opened, labeled]
-  schedule:
-    # Run every 6 hours to triage untriaged issues
-    - cron: '0 */6 * * *'
-
-jobs:
-  agent-triage-issues:
-    runs-on: ubuntu-latest
-    # Run for:
-    # - Scheduled runs (batch processing)
-    # - New issues (need component labeling)
-    # - Issues labeled with "planned" (need owner assignment)
-    if: >-
-      github.repository == 'google/adk-python' && (
-        github.event_name == 'schedule' ||
-        github.event.action == 'opened'
-      )
-    permissions:
-      issues: write
-      contents: read
-
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v6
-
-      - name: Set up Python
-        uses: actions/setup-python@v6
-        with:
-          python-version: '3.11'
-
-      - name: Install dependencies
-        run: |
-          python -m pip install --upgrade pip
-          pip install requests google-adk
-
-      - name: Run Triaging Script
-        env:
-          GITHUB_TOKEN: ${{ secrets.ADK_TRIAGE_AGENT }}
-          GOOGLE_API_KEY: ${{ secrets.GOOGLE_API_KEY }}
-          GOOGLE_GENAI_USE_VERTEXAI: 0
-          OWNER: ${{ github.repository_owner }}
-          REPO: ${{ github.event.repository.name }}
-          INTERACTIVE: 0
-          EVENT_NAME: ${{ github.event_name }} # 'issues', 'schedule', etc.
-          ISSUE_NUMBER: ${{ github.event.issue.number }}
-          ISSUE_TITLE: ${{ github.event.issue.title }}
-          ISSUE_BODY: ${{ github.event.issue.body }}
-          ISSUE_COUNT_TO_PROCESS: '3' # Process 3 issues at a time on schedule
-          PYTHONPATH: contributing/samples/adk_team
-        run: python -m adk_triaging_agent.main