Removed 'fatal_injury' attribute from gunshot injuries
Removed 'fatal_injury' attribute from gunshot injuries

I originally intended for this attribute to be leveraged by the self harm module to handle firearm suicides. However, this attribute no longer makes sense - firearm suicides would not require an ED admission. Removing this attribute altogether.

AmartC/synthea,synthetichealth/synthea,synthetichealth/synthea,synthetichealth/synthea,AmartC/synthea,cjduffett/synthea,cjduffett/synthea