fix: resolve linter errors in Android modules

- Remove unused imports from mobsf_scanner.py (asyncio, hashlib, json, Optional)
- Remove unused variables from opengrep_android.py (start_col, end_col)
- Remove duplicate Path import from workflow.py

backend/toolbox/modules/android/mobsf_scanner.py

@@ -16,14 +16,11 @@ Performs static analysis on APK files including permissions, manifest analysis,
 #
 # Additional attribution and requirements are provided in the NOTICE file.
 
-import asyncio
-import hashlib
-import json
 import logging
 import os
 from collections import Counter
 from pathlib import Path
-from typing import Dict, Any, List, Optional
+from typing import Dict, Any, List
 import aiohttp
 
 try:

backend/toolbox/modules/android/opengrep_android.py

@@ -273,8 +273,6 @@ class OpenGrepAndroid(BaseModule):
                 path_info = result.get("path", "")
                 start_line = result.get("start", {}).get("line", 0)
                 end_line = result.get("end", {}).get("line", 0)
-                start_col = result.get("start", {}).get("col", 0)
-                end_col = result.get("end", {}).get("col", 0)
 
                 # Code snippet
                 lines = extra.get("lines", "")

backend/toolbox/workflows/android_static_analysis/workflow.py

@@ -129,7 +129,6 @@ class AndroidStaticAnalysisWorkflow:
 
         # Handle case where workspace_path is a file (single APK upload)
         # vs. a directory containing files
-        from pathlib import Path
         workspace_path_obj = Path(workspace_path)
 
         # Determine actual workspace directory and APK path