--- a/toolkit/components/telemetry/TelemetryScalar.cpp
+++ b/toolkit/components/telemetry/TelemetryScalar.cpp
@@ -615,29 +615,16 @@ KeyedScalar::AddValue(const nsAString& a
   if (sr != ScalarResult::Ok) {
     MOZ_ASSERT(false, "Key too long or too many keys are recorded in the scalar.");
     return;
   }
 
   return scalar->AddValue(aValue);
 }
 
-void
-KeyedScalar::SetMaximum(const nsAString& aKey, uint32_t aValue)
-{
-  ScalarBase* scalar = nullptr;
-  ScalarResult sr = GetScalarForKey(aKey, &scalar);
-  if (sr != ScalarResult::Ok) {
-    MOZ_ASSERT(false, "Key too long or too many keys are recorded in the scalar.");
-    return;
-  }
-
-  return scalar->SetMaximum(aValue);
-}
-
 /**
  * Get a key-value array with the values for the Keyed Scalar.
  * @param aValue The array that will hold the key-value pairs.
  * @return {nsresult} NS_OK or an error value as reported by the
  *         the specific scalar objects implementations (e.g.
  *         ScalarUnsigned).
  */
 nsresult