Improve performance by removing the inode and pid process

[yuuki]

[y_uuki@hoge ~]$ ss -tan | wc -l
27

before

[y_uuki@hoge ~]$ time ./lstf_v0.4.2 -n >/dev/null

real	0m0.269s
user	0m0.020s
sys	0m0.212s

after

[y_uuki@hoge ~]$ time ./lstf -n >/dev/null

real	0m0.222s
user	0m0.020s
sys	0m0.180s

[coveralls]

Pull Request Test Coverage Report for Build 54

• 0 of 94 (0.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-5.2%) to 39.723%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
tcpflow/tcpflow_linux.go	0	29	0.0%
netutil/netutil_linux.go	0	65	0.0%

Totals
Change from base Build 49:	-5.2%
Covered Lines:	172
Relevant Lines:	433

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💛 - Coveralls