diff --git a/core/fxcodec/gif/cfx_gifcontext.cpp b/core/fxcodec/gif/cfx_gifcontext.cpp
index 66e316b..3bc9546 100644
--- a/core/fxcodec/gif/cfx_gifcontext.cpp
+++ b/core/fxcodec/gif/cfx_gifcontext.cpp
@@ -436,15 +436,11 @@
         return CFX_GifDecodeStatus::Unfinished;
       }
 
-      cmt_data_.clear();
       while (*data_size != GIF_BLOCK_TERMINAL) {
-        uint8_t block_size = *data_size;
         if (!ReadData(&data_buf, *data_size) || !ReadData(&data_size, 1)) {
           skip_size_ = skip_size_org;
           return CFX_GifDecodeStatus::Unfinished;
         }
-
-        cmt_data_ += ByteString(data_buf, block_size);
       }
       break;
     }
diff --git a/core/fxcodec/gif/cfx_gifcontext.h b/core/fxcodec/gif/cfx_gifcontext.h
index ba23522..597af73 100644
--- a/core/fxcodec/gif/cfx_gifcontext.h
+++ b/core/fxcodec/gif/cfx_gifcontext.h
@@ -52,7 +52,6 @@
   uint32_t avail_in_;
   int32_t decode_status_;
   uint32_t skip_size_;
-  ByteString cmt_data_;
   std::unique_ptr<CFX_GifGraphicControlExtension> graphic_control_extension_;
   uint8_t* next_in_;
   std::vector<std::unique_ptr<CFX_GifImage>> images_;