fix: revert copy permission part

...as this would cause the current code to filter out all
cohorts. Current code requires the user to have ALL read permissions listed
in the schema to see a cohort definition...

src/main/java/org/ohdsi/webapi/security/model/CohortDefinitionPermissionSchema.java

@@ -20,8 +20,7 @@ public class CohortDefinitionPermissionSchema extends EntityPermissionSchema {
 
 	put("cohortdefinition:%s:version:get", "Get list of cohort versions");
 	put("cohortdefinition:%s:version:*:get", "Get cohort version");		       
-  put("cohortdefinition:%s:copy:get", "Copy the specified cohort definition");
-}
+      }
     };
 
     public CohortDefinitionPermissionSchema() {