Update requirements.txt by removing mcp dependency

Removed mcp dependency and updated formatting.

Author: NirajC-Microsoft

src/backend/requirements.txt

@@ -15,7 +15,6 @@ opentelemetry-instrumentation-openai
 opentelemetry-exporter-otlp-proto-http
 
 semantic-kernel[azure]==1.32.2
-mcp>=1.2.0
 azure-ai-projects==1.0.0b11
 openai==1.84.0 
 azure-ai-inference==1.0.0b9