优化

src/app/views/qrcode-configuration/qrcode-configuration.component.ts

@@ -2,7 +2,6 @@ import { Component, OnInit, ViewChild } from "@angular/core";
 import { ActivatedRoute } from "@angular/router";
 import { FormBuilder, Validators, FormGroup } from "@angular/forms";
 
-import { MainService } from "../../services/main.service";
 import { OverlayScrollbarsComponent } from "overlayscrollbars-ngx";
 import { ToolService } from "../../services/tool.service";
 import { Subject } from "rxjs";
@@ -23,7 +22,6 @@ export class QRCodeConfigurationComponent implements OnInit {
   constructor(
     private fb: FormBuilder,
     private route: ActivatedRoute,
-    private mainService: MainService,
     private tool: ToolService,
     private qrCodeConfigurationService: QRCodeConfigurationService,
   ) {}