Remove indicators

[MikeJohnPage]

Some indicators need removing where data is not available:

• [ ] self harm
• [ ] children in state care
• [ ] low pay
• [ ] difficulty completing activities of daily living
• [ ] atrial fibrillation
• [ ] heart disease
• [ ] arterial disease
• [ ] stroke & TIA
• [ ] public green space
• [ ] Kidney Disease
• [ ] Children's Social, Emotional and Mental Health
• [ ] Internet Access - only two values are missing. We may be able to impute these.

[MikeJohnPage]

This is to be completed after PR #41 has been reviewed.