refactor(ftq): remove some unused code

[Yan-Muzi]

No description provided.

[XiangShanRobot]

[Generated by IPC robot]
commit: bf122e5

commit	astar	copy_and_run	coremark	gcc	gromacs	hmmer-Vector	lbm	linux	mcf	microbench	milc	namd	povray	wrf	xalancbmk
bf122e5	1.819	0.442	2.634	1.230	2.144	1.678	2.145	2.364	0.943	1.380	1.998	3.101	2.547	2.272	3.300

master branch:

commit	astar	copy_and_run	coremark	gcc	gromacs	hmmer-Vector	lbm	linux	mcf	microbench	milc	namd	povray	wrf	xalancbmk
51f9a95				1.231		1.678			0.943			3.101			3.300
8882eb6	1.819	0.442	2.634	1.222	2.144	1.678	2.145	2.364	0.943	1.380	1.998	3.101	2.547	2.272	3.298
dda64e0	1.819	0.442	2.634	1.231	2.144	1.678	2.145	2.364	0.943	1.388	1.998	3.101	2.547	2.272	3.300
914bbc8	1.819	0.442	2.634	1.236	2.144	1.678	2.145	2.364	0.943	1.388	1.998	3.101	2.547	2.272	3.300
a94ed9a	1.819	0.442	2.634	1.231	2.144	1.678	2.145	2.364	0.943	1.380	1.998	3.101	2.547	2.272	3.300
99ce557	1.819	0.442	2.634	1.223	2.144	1.678	2.145	2.364	0.943	1.380	1.998	3.101	2.547	2.272	3.300
302eb94	1.819	0.442	2.634	1.215	2.144	1.678	2.145	2.364	0.943	1.380	1.998	3.101	2.547	2.272	3.300
48f7f55	1.819	0.442	2.634	1.228	2.144	1.678	2.145	2.364	0.943	1.380	1.998	3.101	2.547	2.272	3.300
7edcfc9	1.819	0.442	2.634	1.228	2.144	1.678	2.145	2.364	0.943	1.388	1.998	3.101	2.547	2.272	3.300
5a36f63	1.819	0.442	2.634	1.235	2.144	1.498	2.145	2.364	0.943	1.380	1.998	3.101	2.547	2.272	3.300

[Gao-Zeyu]

LGTM