fix(date-picker): remove redundant date picker border radius (#8259)

Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

Author: emyarod

packages/components/src/components/date-picker/_flatpickr.scss

@@ -24,7 +24,6 @@
   border-radius: 0;
   font-size: 14px;
   line-height: 24px;
-  border-radius: 5px;
   position: absolute;
   width: 315px;
   box-sizing: border-box;