[lldb][AArch64] Fix an unused variable warning in release builds. NFC

GitOrigin-RevId: 82d4f39f342165a92eaa1fe74488158942cf27b4
diff --git a/source/Plugins/Process/Utility/MemoryTagManagerAArch64MTE.cpp b/source/Plugins/Process/Utility/MemoryTagManagerAArch64MTE.cpp
index e0126d8..dbd36fb 100644
--- a/source/Plugins/Process/Utility/MemoryTagManagerAArch64MTE.cpp
+++ b/source/Plugins/Process/Utility/MemoryTagManagerAArch64MTE.cpp
@@ -290,6 +290,7 @@
   const size_t bytes_copied =
       reader(tag_segment_data_address + file_offset_in_bytes, tag_bytes_to_read,
              tag_data.data());
+  (void)bytes_copied;
   assert(bytes_copied == tag_bytes_to_read);
 
   std::vector<lldb::addr_t> tags;