refactor: remove duckduckgo-search import error checks

gitea/tools/research_tools.py

@@ -20,6 +20,11 @@ import time
 from typing import Any
 
 import httpx
+from duckduckgo_search import DDGS  # type: ignore[import-untyped]
+from duckduckgo_search.exceptions import (  # type: ignore[import-untyped]
+    DuckDuckGoSearchException,
+    RatelimitException,
+)
 
 from gitea.config import SEARXNG_URL
 
@@ -311,22 +316,6 @@ class ResearchTools:
         logger.info("SearXNG unavailable; falling back to DuckDuckGo")
 
         # --- Tier 2: DDGS library (handles sessions, cookies, rate limits) ---
-        try:
-            from duckduckgo_search import DDGS  # type: ignore[import-untyped]
-        except ImportError:
-            logger.debug("duckduckgo-search not installed; using httpx fallback")
-            return self._web_search_fallback(query, num_results)
-
-        # Import exception types (package versions differ on exact names)
-        try:
-            from duckduckgo_search.exceptions import (  # type: ignore[import-untyped]
-                RatelimitException,
-                DuckDuckGoSearchException,
-            )
-        except ImportError:
-            RatelimitException = Exception  # type: ignore[assignment,misc]
-            DuckDuckGoSearchException = Exception  # type: ignore[assignment,misc]
-
         last_exc: Exception | None = None
         for attempt in range(3):
             try: