Remove errant coverage.sh file (Fixes #362)
Remove errant coverage.sh file (Fixes #362)

catalpainternational/rapidsms,eHealthAfrica/rapidsms,peterayeni/rapidsms,lsgunth/rapidsms,caktus/rapidsms,ehealthafrica-ci/rapidsms,ehealthafrica-ci/rapidsms,lsgunth/rapidsms,peterayeni/rapidsms,eHealthAfrica/rapidsms,caktus/rapidsms,eHealthAfrica/rapidsms,peterayeni/rapidsms,ehealthafrica-ci/rapidsms,catalpainternational/rapidsms,caktus/rapidsms,lsgunth/rapidsms,catalpainternational/rapidsms,catalpainternational/rapidsms,peterayeni/rapidsms,lsgunth/rapidsms