Remove unnecessary overriding CSS rules

Now that https://gitlab.com/gitlab-org/gitlab/-/merge_requests/30903 is
merged we don't need these overriding CSS rules

ee/app/assets/stylesheets/components/audit_logs/logs_table.scss

-// TODO: Remove this once https://gitlab.com/gitlab-org/gitlab/-/issues/213324 is resolved
-.audit-log-table .gl-table {
-  th {
-    font-weight: 600;
-    line-height: 1rem;
-  }
-
-  th,
-  td {
-    @include gl-text-gray-700;
-  }
+.audit-log-table .gl-table th {
+  @include gl-line-height-normal;
 }