Biogen (NSDQ:BIIB) has scrapped its development plans for gosuranemab (BIIB092) after the drug candidate failed to hit the primary endpoint in a Phase 2 trial.  Biogen’s aducanumab made waves recently, becoming the first Alzheimer’s drug to win FDA approval in recent memory. Not all, however, are happy with that fact.  Aducanumab is an amyloid beta-protein…