Dashboard frontend: removed current client info [ci skip]

No client apart from claude code sends it..

src/serena/resources/dashboard/dashboard.js

@@ -704,10 +704,6 @@ class Dashboard {
             html += '<div class="config-label">File Encoding:</div>';
             html += '<div class="config-value">' + (config.encoding || 'N/A') + '</div>';
 
-            // Current Client info
-            html += '<div class="config-label">Current Client:</div>';
-            html += '<div class="config-value">' + (config.current_client || 'None') + '</div>';
-
             html += '</div>';
 
             // Active tools - collapsible