gnome-shell: Remove unneeded calendar-week-number padding

Based on upstream commit:
https://gitlab.gnome.org/GNOME/gnome-shell/-/commit/b1f4ac10da91a081852a0435fa75bef1c12f491c

Author: jnsh

common/gnome-shell/3.38/sass/_common.scss

@@ -1189,7 +1189,6 @@ StScrollBar {
     height: 15px;
     width: 19px;
     border-radius: 2px;
-    padding: 4px 0 0;
     margin: 6px;
     background-color: if($variant!='dark', transparentize($fg_color,0.9), transparentize($fg_color,0.7));
     color: if($variant!='dark', transparentize($fg_color,0.5), $bg_color);