Remove totally unused code from OMX.cpp

////////////////////////////////////////////////////////////////////////////////

class BufferMeta {

public:

    BufferMeta(OMX *owner, const sp<IMemory> &mem, bool is_backup = false)

        : mOwner(owner),

          mMem(mem),

          mIsBackup(is_backup) {

    }

    BufferMeta(OMX *owner, size_t size)

        : mOwner(owner),

          mSize(size),

          mIsBackup(false) {

    }

    void CopyFromOMX(const OMX_BUFFERHEADERTYPE *header) {

        if (!mIsBackup) {

            return;

        }

        memcpy((OMX_U8 *)mMem->pointer() + header->nOffset,

               header->pBuffer + header->nOffset,

               header->nFilledLen);

    }

    void CopyToOMX(const OMX_BUFFERHEADERTYPE *header) {

        if (!mIsBackup) {

            return;

        }

        memcpy(header->pBuffer + header->nOffset,

               (const OMX_U8 *)mMem->pointer() + header->nOffset,

               header->nFilledLen);

    }

private:

    OMX *mOwner;

    sp<IMemory> mMem;

    size_t mSize;

    bool mIsBackup;

    BufferMeta(const BufferMeta &);

    BufferMeta &operator=(const BufferMeta &);

};

OMX::OMX()

    : mMaster(new OMXMaster),

      mDispatcher(new CallbackDispatcher(this)),