[TST] Fix test_quantile_interpolation_int#26633

Merged

simonjayhawkins merged 2 commits intopandas-dev:masterfrom

makbigc:cln-26556

Jun 5, 2019

Commits on Jun 3, 2019

Remove duplicate code
makbigc
committed

Commits on Jun 4, 2019

Undo the deletion and add linear interpolation to q1
makbigc
committed