Don't send CDP result when message is forward to inspector.

Rely on inspector to send the result, otherwise we'll send 2 responses to the
same message (one ourselves and one from the inspector), which Playwright does
not like.

src/cdp/runtime.zig

@@ -57,10 +57,6 @@ fn sendInspector(cmd: anytype, action: anytype) !void {
     }
 
     bc.session.callInspector(cmd.input.json);
-
-    if (cmd.input.id != null) {
-        return cmd.sendResult(null, .{});
-    }
 }
 
 pub const ExecutionContextCreated = struct {