fix: clean invisible edge when toggling tool mode

[lucaseduoli]

This pull request includes several changes to the FlowPage component and flowStore in the frontend. The primary focus is on removing unused functions and improving state management for nodes and edges.

Improvements to FlowPage component:

• src/frontend/src/pages/FlowPage/components/PageComponent/index.tsx: Removed the unused checkOldComponents import.
• src/frontend/src/pages/FlowPage/components/PageComponent/index.tsx: Removed the elevateEdgesOnSelect property from the component props.

Enhancements to flowStore:

• src/frontend/src/stores/flowStore.ts: Removed the unused checkOldComponents import.
• src/frontend/src/stores/flowStore.ts: Added logic to clean edges when nodes are updated, ensuring the state remains consistent.
• src/frontend/src/stores/flowStore.ts: Updated the store state to include the newly cleaned edges.