fix compiler error

lib/walberla/experimental/memory/MemoryTags.hpp

@@ -88,8 +88,6 @@ struct SelectStandardAllocator< memtag::unified >
 
 } // namespace detail
 
-using MemTag = memtag::MemTag;
-
 /**
  * @brief Standard allocator implementation for a given memory tag and value type.
  *

src/walberla/codegen/communication/pack_infos.py

@@ -226,7 +226,7 @@ class GpuPdfFieldPackInfo(CustomGenerator):
                 .inline()
                 .const()
                 .params(dir)
-                .returns(uint_t)(f"return {self._field.index_shape[0]};"),
+                .returns(uint_t)(f"return {self._field.index_shape[0]};"),  # FIXME: Wrong!
             )
         )