remove unneeded table boarders on mdm page (#17492)

remove unneeded header boarders on mdm pages.

**before:**


![image](https://github.com/fleetdm/fleet/assets/1153709/6fd93f49-1218-468c-a83b-aa80ca7b0384)


**after:**


![image](https://github.com/fleetdm/fleet/assets/1153709/ad885532-c88e-474e-b88c-90155c5416e3)


- [x] Manual QA for all new/changed functionality

frontend/pages/ManageControlsPage/OSSettings/cards/DiskEncryption/components/DiskEncryptionTable/DiskEncryptionTableConfig.tsx

@@ -86,10 +86,7 @@ const defaultTableHeaders: IDataColumn[] = [
     ),
     disableSortBy: true,
     accessor: "macosHosts",
-    Cell: ({
-      cell: { value: aggregateCount },
-      row: { original },
-    }: ICellProps) => {
+    Cell: ({ cell: { value: aggregateCount } }: ICellProps) => {
       return (
         <div className="disk-encryption-table__aggregate-table-data">
           <TextCell value={aggregateCount} formatter={(val) => <>{val}</>} />
@@ -191,8 +188,6 @@ const STATUS_CELL_VALUES: Record<DiskEncryptionStatus, IStatusCellValue> = {
   },
 };
 
-type StatusEntry = [DiskEncryptionStatus, IDiskEncryptionStatusAggregate];
-
 // Order of the status column. We want the order to always be the same.
 const STATUS_ORDER = [
   "verified",

frontend/pages/ManageControlsPage/OSSettings/cards/DiskEncryption/components/DiskEncryptionTable/_styles.scss

@@ -5,6 +5,10 @@
     min-width: auto;
   }
 
+  .data-table-block th:nth-last-child(2) {
+    border-right: none;
+  }
+
   @media (max-width: $break-md) {
     .view-hosts-link {
       span {

frontend/pages/ManageControlsPage/OSUpdates/components/OSVersionTable/OSVersionTableConfig.tsx

@@ -60,7 +60,7 @@ export const generateTableHeaders = (teamId: number) => {
         />
       ),
       Cell: ({ row }: IHostCellProps): JSX.Element => {
-        const { hosts_count, name_only, version } = row.original;
+        const { hosts_count } = row.original;
         return <TextCell value={hosts_count} />;
       },
     },

frontend/pages/ManageControlsPage/OSUpdates/components/OSVersionTable/_styles.scss

@@ -15,4 +15,8 @@
       opacity: 1;
     }
   }
+
+  .data-table-block th:nth-last-child(2) {
+    border-right: none;
+  }
 }

frontend/pages/ManageControlsPage/SetupExperience/cards/BootstrapPackage/components/BootstrapPackageTable/_styles.scss

@@ -10,7 +10,7 @@
     min-width: auto;
   }
 
-  th:nth-last-child(2) {
+  .data-table-block th:nth-last-child(2) {
     border-right: 0;
   }