fix: resolve ruff lint errors in claude agent sdk files

Author: andrewm4894

examples/example-ai-claude-agent-sdk/multi_turn.py

@@ -4,7 +4,7 @@
 import os
 
 from claude_agent_sdk import AssistantMessage, ResultMessage
-from claude_agent_sdk.types import ClaudeAgentOptions, TextBlock, ToolUseBlock
+from claude_agent_sdk.types import ClaudeAgentOptions, TextBlock
 from posthog import Posthog
 from posthog.ai.claude_agent_sdk import PostHogClaudeSDKClient
 

posthog/ai/claude_agent_sdk/client.py

@@ -26,7 +26,6 @@
 from posthog.ai.claude_agent_sdk.processor import (
     PostHogClaudeAgentProcessor,
     _GenerationTracker,
-    _ensure_serializable,
 )
 from posthog.client import Client
 

posthog/test/ai/claude_agent_sdk/test_processor.py

@@ -19,7 +19,6 @@
     from posthog.ai.claude_agent_sdk import (
         PostHogClaudeAgentProcessor,
         instrument,
-        query,
     )
 
     CLAUDE_AGENT_SDK_AVAILABLE = True
@@ -548,7 +547,7 @@ async def test_all_messages_yielded_unchanged(self, processor, mock_client):
         assert len(collected) == len(original_messages)
         # Verify types match
         for orig, got in zip(original_messages, collected):
-            assert type(orig) == type(got)
+            assert type(orig) is type(got)
 
 
 class TestInstrumentFunction: