Remove duplicated setting of color in th (#2032)

Co-authored-by: Paweł Kuna <[email protected]>

.changeset/orange-maps-fetch.md

@@ -0,0 +1,5 @@
+---
+"@tabler/core": patch
+---
+
+Remove duplicated setting of color in `th` element

src/scss/ui/_tables.scss

@@ -1,7 +1,6 @@
 .table {
   thead {
     th {
-      color: $table-th-color;
       background: $table-th-bg;
       @include subheader;
       padding-top: $table-th-padding-y;