strat: split out common functionality for future meso use

stratosphere/pm/source/impl/pm_resource_manager.cpp

@@ -13,10 +13,6 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
-
-#include <stratosphere.hpp>
-#include <stratosphere/spl.hpp>
-
 #include "pm_resource_manager.hpp"
 
 namespace ams::pm::resource {