Members overview already shows the 2019 cohort in filters

Ghost User
2019-02-13T19:06:34+01:00

### One-sentence description

Members overview already shows the 2019 cohort

### Current behaviour / Reproducing the bug
1. Go to https://thalia.nu/members/
2. See the tab for 2019

### Expected behaviour
1. Go to https://thalia.nu/members/
2. No tab for 2019 yet