PEL: Remove userHeader::getValue

getValue function is now being used to get field values for all the
different sections. Therefore, it makes sense to
remove the older implementation of this function from userHeader class.

Change-Id: I041b8c5e0548e9f7ee354f21d2e248ed946df5ec
Signed-off-by: Aatir <aatrapps@gmail.com>
diff --git a/extensions/openpower-pels/user_header.cpp b/extensions/openpower-pels/user_header.cpp
index c52d4b5..9258e78 100644
--- a/extensions/openpower-pels/user_header.cpp
+++ b/extensions/openpower-pels/user_header.cpp
@@ -16,6 +16,7 @@
 #include "user_header.hpp"
 
 #include "pel_types.hpp"
+#include "pel_values.hpp"
 #include "severity.hpp"
 
 #include <iostream>
@@ -26,6 +27,7 @@
 namespace pels
 {
 
+namespace pv = openpower::pels::pel_values;
 using namespace phosphor::logging;
 
 void UserHeader::unflatten(Stream& stream)
@@ -127,30 +129,16 @@
     _valid = (failed) ? false : true;
 }
 
-std::string UserHeader::getValue(const uint8_t field,
-                                 const pel_values::PELValues& values) const
-{
-
-    auto tmp = pel_values::findByValue(field, values);
-    if (tmp != values.end())
-    {
-        return std::get<pel_values::registryNamePos>(*tmp);
-    }
-    else
-    {
-        return "invalid";
-    }
-}
 std::optional<std::string> UserHeader::getJSON() const
 {
     std::string severity;
     std::string subsystem;
     std::string eventScope;
     std::string eventType;
-    severity = getValue(_eventSeverity, pel_values::severityValues);
-    subsystem = getValue(_eventSubsystem, pel_values::subsystemValues);
-    eventScope = getValue(_eventScope, pel_values::eventScopeValues);
-    eventType = getValue(_eventType, pel_values::eventTypeValues);
+    severity = pv::getValue(_eventSeverity, pel_values::severityValues);
+    subsystem = pv::getValue(_eventSubsystem, pel_values::subsystemValues);
+    eventScope = pv::getValue(_eventScope, pel_values::eventScopeValues);
+    eventType = pv::getValue(_eventType, pel_values::eventTypeValues);
     char tmpUhVal[8];
     sprintf(tmpUhVal, "%d", userHeaderVersion);
     std::string uhVerStr(tmpUhVal);