[dbus] fix typo (#625)
diff --git a/src/dbus/server/dbus_thread_object.cpp b/src/dbus/server/dbus_thread_object.cpp
index 936deec..88e7f6b 100644
--- a/src/dbus/server/dbus_thread_object.cpp
+++ b/src/dbus/server/dbus_thread_object.cpp
@@ -529,8 +529,7 @@
auto threadHelper = mNcp->GetThreadHelper();
otDeviceRole role = otThreadGetDeviceRole(threadHelper->GetInstance());
std::string roleName = GetDeviceRoleName(role);
- ;
- otError error = OT_ERROR_NONE;
+ otError error = OT_ERROR_NONE;
VerifyOrExit(DBusMessageEncodeToVariant(&aIter, roleName) == OTBR_ERROR_NONE, error = OT_ERROR_INVALID_ARGS);