Remove unused bytes_copied variable in decode.c

This CL removes an unused `bytes_copied` variable from decode.c because
it caused errors in amd-cezanne-fsp due to a newly introduced warning
for -Wunused-but-set-variable in llvm-next.

BUG=b:195701842
TEST=CQ

Change-Id: I126b47cefe1a752ae591c0ef239d3288a6447dc4
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/edk2/+/3130601
Reviewed-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
Tested-by: Manoj Gupta <manojgupta@chromium.org>
diff --git a/BaseTools/Source/C/BrotliCompress/dec/decode.c b/BaseTools/Source/C/BrotliCompress/dec/decode.c
index 0b3eca3..dc039d9 100644
--- a/BaseTools/Source/C/BrotliCompress/dec/decode.c
+++ b/BaseTools/Source/C/BrotliCompress/dec/decode.c
@@ -2020,10 +2020,8 @@
         s->state = BROTLI_STATE_HUFFMAN_CODE_0;

         break;

       case BROTLI_STATE_UNCOMPRESSED: {

-        int bytes_copied = s->meta_block_remaining_len;

         result = CopyUncompressedBlockToOutput(

             available_out, next_out, total_out, s);

-        bytes_copied -= s->meta_block_remaining_len;

         if (result != BROTLI_DECODER_SUCCESS) {

           break;

         }

diff --git a/MdeModulePkg/Library/BrotliCustomDecompressLib/dec/decode.c b/MdeModulePkg/Library/BrotliCustomDecompressLib/dec/decode.c
index 3bee3e7..2aea893 100644
--- a/MdeModulePkg/Library/BrotliCustomDecompressLib/dec/decode.c
+++ b/MdeModulePkg/Library/BrotliCustomDecompressLib/dec/decode.c
@@ -2024,10 +2024,8 @@
         s->state = BROTLI_STATE_HUFFMAN_CODE_0;

         break;

       case BROTLI_STATE_UNCOMPRESSED: {

-        int bytes_copied = s->meta_block_remaining_len;

         result = CopyUncompressedBlockToOutput(

             available_out, next_out, total_out, s);

-        bytes_copied -= s->meta_block_remaining_len;

         if (result != BROTLI_DECODER_SUCCESS) {

           break;

         }