remove var not used in test

Author: elewis2

tests/test_ipr/test_data/expression.tab

@@ -22,7 +22,6 @@ MYCBP2	4.86	no_category		83.0	0.91	79.09	100.0	4.23		-0.34	-0.377	32	0.869	0.716
 ITGAL	1.29	underexpressed		39.0	-0.15	44.49	100.0	5.56		0.35	-0.46	76	0.492	-2.496	-0.52	-0.537	11	2.371	0.594	0.2	0.3	0.4	0.5
 ITGA3	3.65	no_category		36.0	-0.14	33.08	0.0	-1.63		-0.41	1.794	89	-1.982	1.161	2.233	2.61	61	-0.517	-1.201	0.2	0.3	0.4	0.5
 ITGA2B	1.12	high_percentile	increased expression	97.0	4.75	73.38	100.0	50.19		0.99	-0.193	92	2.786	0.537	2.113	1.888	31	0.915	0.861	0.2	0.3	0.4	0.5
-DPYD	1.12	increased rna expression	increased expression	97.0	4.75	73.38	100.0	50.19		0.99	-0.193	92	2.786	0.537	2.113	1.888	31	0.915	0.861	0.2	0.3	0.4	0.5
 OSBPL7	5.68	overexpressed	increased expression	96.0	1.65	51.33	100.0	48.29		0.47	-1.087	9	-2.799	-0.72	-2.929	1.697	67	-0.021	-2.544	0.2	0.3	0.4	0.5
 TMEM98	16.64	overexpressed	increased expression	38.0	-0.25	29.28	0.0	-1.88		1.36	2.178	45	0.923	-1.784	-2.923	-2.131	92	-1.135	2.489	0.2	0.3	0.4	0.5
 KRT33A	0.05	high_percentile	increased expression	95.0	inf	41.83	100.0	inf		1.44	-2.96	82	1.736	-2.776	-2.725	1.0	14	0.936	-0.869	0.2	0.3	0.4	0.5