[FIX] [Bootstrap] Uniform default table background

Also removed empty style and class arguments while I was at it

allianceauth/authentication/templates/authentication/dashboard.characters.html

@@ -17,7 +17,7 @@
                             <span class="d-md-inline m-2">{% translate 'Change Main' %}</span>
                         </a>
                     </div>
-                    <table class="table" style="--bs-table-bg: transparent;">
+                    <table class="table">
                         <thead>
                             <tr>
                                 <th class="text-center"></th>

allianceauth/authentication/templates/authentication/dashboard.groups.html

@@ -6,7 +6,7 @@
             <div class="card-body">
                 <div style="height: 300px; overflow-y:auto;">
                     <h6 class="text-center">{% translate "State:" %} {{ request.user.profile.state }}</h6>
-                    <table class="table" style="--bs-table-bg: transparent;">
+                    <table class="table">
                         {% for group in groups %}
                             <tr>
                                 <td class="text-center">{{ group.name }}</td>