Remove unused variable

pystencils/cpu/cpujit.py

@@ -547,12 +547,10 @@ def compile_module(code, code_hash, base_dir):
     extra_flags = ['-I' + get_paths()['include'], '-I' + get_pystencils_include_path()]
 
     if compiler_config['os'].lower() == 'windows':
-        function_prefix = '__declspec(dllexport)'
         lib_suffix = '.pyd'
         object_suffix = '.obj'
         windows = True
     else:
-        function_prefix = ''
         lib_suffix = '.so'
         object_suffix = '.o'
         windows = False