physical: Fix cert-dcl59-cpp
```
../physical.hpp:19:1: error: do not use unnamed namespaces in header files [cert-dcl59-cpp,-warnings-as-errors]
namespace
^
```
Change-Id: I8e663e42604c9f813c3f8febeb7e5bdb6ac0262b
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/physical.hpp b/physical.hpp
index b057362..b36d6e8 100644
--- a/physical.hpp
+++ b/physical.hpp
@@ -16,11 +16,8 @@
/** @brief De-assert value */
constexpr unsigned long DEASSERT = 0;
-namespace
-{
using PhysicalIfaces = sdbusplus::server::object_t<
sdbusplus::xyz::openbmc_project::Led::server::Physical>;
-}
/** @class Physical
* @brief Responsible for applying actions on a particular physical LED