Here ya go.
I got a bonus for you if you have a little more space, you can wrap the text ;p
.psc-hideDropdownIcon .iaDropdownCommon_expandIcon.ia_dropdown__expandIcon{
display:none;
}
.psc-wrapDropdownText .ia_dropdown__valuePill__value{
white-space:pre-wrap;
word-break:break-all;
}