removed the placeholder option from the default multi select2 (#123)

Author: OwenMelbz

src/resources/views/fields/select2_multiple.blade.php

@@ -5,8 +5,7 @@
         name="{{ $field['name'] }}[]"
         @include('crud::inc.field_attributes', ['default_class' =>  'form-control select2'])
         multiple>
-        <option value="">-</option>
-
+        
         @if (isset($field['model']))
             @foreach ($field['model']::all() as $connected_entity_entry)
                 <option value="{{ $connected_entity_entry->getKey() }}"
@@ -56,4 +55,4 @@
 
 @endif
 {{-- End of Extra CSS and JS --}}
-{{-- ########################################## --}}
+{{-- ########################################## --}}