PEL: Removed unused includes

The clangd LSP indicates when includes aren't used directly.

Tested:
Unit tests pass.

Change-Id: I8290fe59abd1cef4fada27aeb5adb2c45c289abb
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
diff --git a/extensions/openpower-pels/pel_entry.hpp b/extensions/openpower-pels/pel_entry.hpp
index 48d43eb..7a8fe15 100644
--- a/extensions/openpower-pels/pel_entry.hpp
+++ b/extensions/openpower-pels/pel_entry.hpp
@@ -1,6 +1,7 @@
 #pragma once
 
-#include "manager.hpp"
+#include <org/open_power/Logging/PEL/Entry/server.hpp>
+
 namespace openpower
 {
 namespace pels
@@ -9,6 +10,8 @@
 using PELEntryIface = sdbusplus::server::org::open_power::logging::pel::Entry;
 using PropertiesVariant = PELEntryIface::PropertiesVariant;
 
+class Repository;
+
 class PELEntry : public PELEntryIface
 {
   public: