netfilter: nf_tables: remove unused variable
Variable 'ext' is being assigned but are never used hence they are unused and can be removed. Cleans up clang warnings: net/netfilter/nf_tables_api.c:4032:28: warning: variable ‘ext’ set but not used [-Wunused-but-set-variable] Signed-off-by: NYueHaibing <yuehaibing@huawei.com> Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>
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