fix(diagnoses): removed a debug message for undefined diagnoses
fix(diagnoses): removed a debug message for undefined diagnoses

Removes a header tag that appears in the Diagnoses component if a
diagnosis form attempts to be viewed but its content is not found.

HospitalRun/hospitalrun-frontend,HospitalRun/hospitalrun-frontend,HospitalRun/hospitalrun-frontend,HospitalRun/hospitalrun-frontend