convert upload page to standalone component

pdb-js/src/app/app.module.ts

@@ -7,7 +7,6 @@ import { FormsModule, ReactiveFormsModule } from "@angular/forms";
 import { AppRoutingModule } from "./app-routing.module";
 import { AppComponent } from "./app.component";
 import { HelpPageComponent } from "./help-page/help-page.component";
-import { UploadPageComponent } from "./upload-page/upload-page.component";
 import { VisualizationPageComponent } from "./visualization-page/visualization-page.component";
 
 import { DatePickerComponent } from "./components/datepicker/date-picker.component";
@@ -61,7 +60,6 @@ import { MainPageComponent } from "./main-page/main-page.component";
 @NgModule({ declarations: [
         AppComponent,
         HelpPageComponent,
-        UploadPageComponent,
         VisualizationPageComponent,
         YAxisDefinitionComponent,
         QueryAutocompleteComponent,