Remove unnecessary styling workarounds

These workarounds were in place due to
https://gitlab.com/gitlab-org/gitlab/-/issues/213324. Now that that's
merged, these can be removed.

ee/app/assets/javascripts/dependencies/components/dependencies_table.vue

@@ -85,8 +85,6 @@ export default {
 </script>
 
 <template>
-  <!-- tbody- and thead-class props can be removed when
-    https://gitlab.com/gitlab-org/gitlab/-/issues/213324 is fixed -->
   <gl-table
     :fields="$options.fields"
     :items="localDependencies"
@@ -94,8 +92,6 @@ export default {
     data-qa-selector="dependencies_table_content"
     details-td-class="pt-0"
     stacked="md"
-    thead-class="gl-text-gray-900"
-    tbody-class="gl-text-gray-900"
   >
     <!-- toggleDetails and detailsShowing are scoped slot props provided by
       GlTable; they mutate/read the item's _showDetails property, which GlTable

ee/changelogs/unreleased/undo-dependency-list-table-styling.yml

+---
+title: Use standard table colors in Dependency List
+merge_request: 31130
+author:
+type: changed