Removed trash can icon

Removed the trash icon since the buttons are used to upload files and not delete them

packages/rocketchat-ui-admin/admin/admin.html

@@ -90,7 +90,7 @@
 													<div class="settings-file-preview">
 														<div class="preview no-file"><i class="icon-upload"></i></div>
 														<div class="action">
-															<div class="button primary"><i class="icon-trash"></i>{{_ 'Select_file'}}
+															<div class="button primary">{{_ 'Select_file'}}
 																<input type="file" accept="{{fileConstraints.contentType}}" />
 															</div>
 														</div>