corret typo

portal/forms.py

@@ -242,7 +242,7 @@ class BatchRemoveDataFileAnnotationForm(forms.Form):
 
 class BatchDeleteDataFileForm(forms.Form):
     datafiles = forms.MultipleChoiceField(required=False, widget=forms.TextInput,
-                                          label=_('Delete the the selected files'))
+                                          label=_('Delete selected files'))
 
 
 class DataSetForm(forms.ModelForm):