Remove irrelevant comment from DSDLC package

libuavcan/dsdl_compiler/libuavcan_dsdl_compiler/__init__.py

@@ -69,7 +69,7 @@ def pretty_filename(filename):
         r = os.path.relpath(filename)
         return a if len(a) < len(r) else r
     except ValueError:
-        return filename  # Fails on Windows "Cannot mix UNC and non-UNC paths", investigate someday later
+        return filename
 
 def type_output_filename(t):
     assert t.category == t.CATEGORY_COMPOUND