Remove debug console.log from render loop

Removed console.log() from connectionPreview render observer that was
executing every frame during connection dragging. This eliminates I/O
blocking and stringification overhead in the critical VR render path.

Performance: Quick win for VR framerate improvement.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/menus/connectionPreview.ts

@@ -81,7 +81,6 @@ export class ConnectionPreview {
                 const pts = this._options.points.flatMap((p: Vector3) => {
                     return p.asArray()
                 });
-                console.log(pts);
                 this._line.setPoints([pts]);
             });
         }