FEAT #13594 TIME 1:00 Clean useless code

src/frontend/app/signature-book.component.ts

-import { Pipe, PipeTransform, Component, OnInit, NgZone, ViewChild, HostListener } from '@angular/core';
+import { Pipe, PipeTransform, Component, OnInit, NgZone, ViewChild } from '@angular/core';
 import { HttpClient } from '@angular/common/http';
 import { DomSanitizer } from '@angular/platform-browser';
 import { Router, ActivatedRoute } from '@angular/router';
@@ -237,10 +237,6 @@ export class SignatureBookComponent implements OnInit {
             });
     }
 
-    processAfterAttach(mode: string) {
-        this.zone.run(() => this.refreshAttachments(mode));
-    }
-
     processAfterAction() {
         var idToGo = -1;
         var c = this.signatureBook.resList.length;