https://github.com/tracim/tracim/issues/782, remove members in the Member's number column, Change Remove workspace for Delete workspace on table head in AdminWorkspacePage

frontend/src/container/AdminWorkspacePage.jsx

                     { /*
                       <th scope='col'>Calendar</th>
                     */ }
-                    <th scope='col'>Remove Workspace</th>
+                    <th scope='col'>Delete workspace</th>
                   </tr>
                 </thead>
                 <tbody>
                         Enable
                       </td>
                     */ }
-                    <td>8 members</td>
+                    <td>8</td>
                     <td>
                       <div className='adminWorkspacePage__workspaceTable__deleteworkspace primaryColorFont primaryColorFontDarkenHover'>
                         <div className='adminWorkspacePage__workspaceTable__deleteworkspace__removalicon mr-3'>
                         Disable
                       </td>
                     */ }
-                    <td>5 members</td>
+                    <td>5</td>
                     <td>
                       <div className='adminWorkspacePage__workspaceTable__deleteworkspace primaryColorFont primaryColorFontDarkenHover'>
                         <div className='adminWorkspacePage__workspaceTable__deleteworkspace__removalicon mr-3'>
                         Enable
                       </td>
                     */ }
-                    <td>3 members</td>
+                    <td>3</td>
                     <td>
                       <div className='adminWorkspacePage__workspaceTable__deleteworkspace primaryColorFont primaryColorFontDarkenHover'>
                         <div className='adminWorkspacePage__workspaceTable__deleteworkspace__removalicon mr-3'>
                         Disable
                       </td>
                     */ }
-                    <td>8 members</td>
+                    <td>8</td>
                     <td>
                       <div className='adminWorkspacePage__workspaceTable__deleteworkspace primaryColorFont primaryColorFontDarkenHover'>
                         <div className='adminWorkspacePage__workspaceTable__deleteworkspace__removalicon mr-3'>
                         Disable
                       </td>
                     */ }
-                    <td>5 members</td>
+                    <td>5</td>
                     <td>
                       <div className='adminWorkspacePage__workspaceTable__deleteworkspace primaryColorFont primaryColorFontDarkenHover'>
                         <div className='adminWorkspacePage__workspaceTable__deleteworkspace__removalicon mr-3'>
                         Enable
                       </td>
                     */ }
-                    <td>3 members</td>
+                    <td>3</td>
                     <td>
                       <div className='adminWorkspacePage__workspaceTable__deleteworkspace primaryColorFont primaryColorFontDarkenHover'>
                         <div className='adminWorkspacePage__workspaceTable__deleteworkspace__removalicon mr-3'>