Remove NetworkX from cognee core

[Vasilije1990]

Issue Description

Remove the NetworkX graph database adapter and its associated dependencies from Cognee to streamline the codebase, reduce dependency overhead, and focus on production-ready graph database providers. NetworkX is primarily used for in-memory graph analysis and is not suitable for production graph storage, making it unnecessary for Cognee's core functionality.

Motivation

Why Remove NetworkX?

1. Production Readiness

• NetworkX is an in-memory graph analysis library, not a persistent graph database
• Lacks scalability for large knowledge graphs
• Not suitable for production workloads with multiple users or large datasets

Current NetworkX Usage Analysis

Direct Dependencies:

# pyproject.toml
"networkx>=3.4.2,<4"  # Main dependency to remove

Code Integration Points:

• Graph database adapter implementation
• Visualization components
• Test suites and examples
• Configuration enums and factory methods

Technical Implementation Plan

Step 1: Dependency Removal

1.1 Remove Package Dependencies

1.2 Update Optional Dependencies

Step 2: Adapter Removal

2.1 Delete NetworkX Adapter Implementation

2.2 Remove NetworkX Imports

File: cognee/infrastructure/databases/graph/get_graph_engine.py

Step 3: Configuration and Data Model Updates

3.1 Update Data Models

3.2 Update Graph Engine Factory

3.3 Update Configuration Documentation

Update docstrings and configuration files that reference NetworkX as a supported provider.

Step 4: Visualization Refactoring

4.1 Remove parts of the logic where networkX is used for visualization or limit it so it is optional

[misselvexu]

/attempt ?