Remove Legacy code from P10 and future code

Remove Occ control code that supports older hardware models P8 and P9.
This is in preparation for occ control taking over occ poll handling.

Change-Id: Iff99ac8ff3a3fe6e9a6af994b20b06793ead50fc
Signed-off-by: Sheldon Bailey <baileysh@us.ibm.com>
diff --git a/occ_pass_through.hpp b/occ_pass_through.hpp
index 3cc462b..047d4ae 100644
--- a/occ_pass_through.hpp
+++ b/occ_pass_through.hpp
@@ -40,12 +40,8 @@
      *  @param[in] path - Path to attach at
      */
     explicit PassThrough(
-        const char* path
-#ifdef POWER10
-        ,
-        std::unique_ptr<open_power::occ::powermode::PowerMode>& powerModeRef
-#endif
-    );
+        const char* path,
+        std::unique_ptr<open_power::occ::powermode::PowerMode>& powerModeRef);
 
     /** @brief Pass through command to OCC from dbus
      *  @param[in] command - command to pass-through
@@ -72,10 +68,8 @@
     /** @brief Pass-through occ path on the bus */
     std::string path;
 
-#ifdef POWER10
     /** @brief OCC PowerMode object */
     std::unique_ptr<open_power::occ::powermode::PowerMode>& pmode;
-#endif
 
     /** @brief OCC device path
      *  For now, here is the hard-coded mapping until