Remove assert

Author: TApplencourt

clang/bindings/python/clang/cindex.py

@@ -2367,7 +2367,6 @@ def is_function_inlined(self) -> bool:
         """
         Check if the function is inlined.
         """
-        assert self.kind == TypeKind.FUNCTIONPROTO
         return conf.lib.clang_Cursor_isFunctionInlined(self)  # type: ignore [no-any-return]
 
     @cursor_null_guard