revert: Revert table thead inline-flex

packages/theme-chalk/src/table.scss

@@ -163,11 +163,6 @@
     cursor: pointer;
   }
 
-  thead th > .cell {
-    display: inline-flex;
-    align-items: center;
-  }
-
   th {
     white-space: nowrap;
     overflow: hidden;