fix(database): removed unused query option

The docs mention that lists should be used for querying/filtering and
the query option is ignored by the object factory. The query option
should be removed so that it is no longer suggested by TypeScript-based
tools, etc.

Closes #706

Author: cartant

src/database/firebase_object_factory.ts

@@ -3,13 +3,11 @@ import { Observer } from 'rxjs/Observer';
 import { observeOn } from 'rxjs/operator/observeOn';
 import * as firebase from 'firebase';
 import * as utils from '../utils';
-import { Query } from '../interfaces';
-import { observeQuery } from './query_observable';
 import { FirebaseObjectFactoryOpts } from '../interfaces';
 
 export function FirebaseObjectFactory (
   absoluteUrlOrDbRef: string | firebase.database.Reference,
-  { preserveSnapshot, query }: FirebaseObjectFactoryOpts = {}): FirebaseObjectObservable<any> {
+  { preserveSnapshot }: FirebaseObjectFactoryOpts = {}): FirebaseObjectObservable<any> {
 
   let ref: firebase.database.Reference;
 

src/interfaces.ts

@@ -65,7 +65,6 @@ export interface FirebaseListFactoryOpts {
 
 export interface FirebaseObjectFactoryOpts {
   preserveSnapshot?: boolean;
-  query?: Query
 }
 
 
@@ -87,4 +86,4 @@ export enum QueryOptions {
   EndAt
 }
 
-export type Primitive = number | string | boolean;
+export type Primitive = number | string | boolean;