driver-legacy/src/main/com/mongodb/DBCollection.java
public void drop() {
        try {
            executor.execute(new DropCollectionOperation(getNamespace(), getWriteConcern()), getReadConcern());
        } catch (MongoWriteConcernException e) {
            throw createWriteConcernException(e);
        }
    }
public void drop() {
        try {
            executor.execute(new DropCollectionOperation(getNamespace(), getWriteConcern()), getReadConcern());
        } catch (MongoWriteConcernException e) {
            throw createWriteConcernException(e);
        }
    }
Drops (deletes) this collection from the database. Use with care.

@throws MongoException if the operation failed
@mongodb.driver.manual reference/command/drop/ Drop Command