diff --git a/omaha_utils.cc b/omaha_utils.cc
index dffa5d3..6bd7525 100644
--- a/omaha_utils.cc
+++ b/omaha_utils.cc
@@ -17,15 +17,17 @@
 #include "update_engine/omaha_utils.h"
 
 #include <base/logging.h>
-#include <base/strings/string_number_conversions.h>
 
 namespace chromeos_update_engine {
 
+namespace {
+
+// The possible string values for the end-of-life status.
 const char kEolStatusSupported[] = "supported";
 const char kEolStatusSecurityOnly[] = "security-only";
 const char kEolStatusEol[] = "eol";
 
-const MilestonesToEol kMilestonesToEolNone = -1;
+}  // namespace
 
 const char* EolStatusToString(EolStatus eol_status) {
   switch (eol_status) {
@@ -48,23 +50,8 @@
     return EolStatus::kSecurityOnly;
   if (eol_status == kEolStatusEol)
     return EolStatus::kEol;
-  LOG(WARNING) << "Invalid EOL attribute: " << eol_status;
+  LOG(WARNING) << "Invalid end-of-life attribute: " << eol_status;
   return EolStatus::kSupported;
 }
 
-std::string MilestonesToEolToString(MilestonesToEol milestones_to_eol) {
-  return base::IntToString(milestones_to_eol);
-}
-
-MilestonesToEol StringToMilestonesToEol(const std::string& milestones_to_eol) {
-  MilestonesToEol milestone = kMilestonesToEolNone;
-  if (!base::StringToInt(milestones_to_eol, &milestone)) {
-    LOG(WARNING) << "Invalid milestones to EOL attribute: "
-                 << milestones_to_eol;
-    return kMilestonesToEolNone;
-  }
-
-  return milestone;
-}
-
 }  // namespace chromeos_update_engine