Remove unresponsive nodes from default nodes list

[laumair]

Description

This PR removes unresponsive nodes from the default nodes list. Note that once any of these nodes become active, it would automatically be available in wallet via this endpoint.

Type of change

• Enhancement

Checklist:

• My code follows the style guidelines for this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• For changes to mobile that include native code (including React Native modules): I have verified that both iOS and Android successfully build in both Debug and Release modes
• For changes to shared: If applicable, I have verified that my changes are implemented correctly in desktop and mobile