chore: Remove unused import

Author: andrewginns

agents_mcp_usage/multi_mcp/multi_mcp_use/pydantic_mcp.py

@@ -6,7 +6,7 @@
 from pydantic_ai.mcp import MCPServerStdio
 from pydantic_ai.usage import UsageLimits
 
-from multi_mcp.mermaid_diagrams import invalid_mermaid_diagram, valid_mermaid_diagram
+from agents_mcp_usage.multi_mcp.mermaid_diagrams import invalid_mermaid_diagram
 
 load_dotenv()