Remove some unused variables

IPython/nbconvert/preprocessors/tests/test_svg2pdf.py

@@ -46,9 +46,6 class Testsvg2pdf(PreprocessorTestsBase):
                                        data={'image/svg+xml':self.simple_svg})
                   ]
         
-        slide_metadata = {'slideshow' : {'slide_type': 'slide'}}
-        subslide_metadata = {'slideshow' : {'slide_type': 'subslide'}}
-
         cells=[nbformat.new_code_cell(source="", execution_count=1, outputs=outputs)]
 
         return nbformat.new_notebook(cells=cells)