SimpleStats: Remove unused method

This fixes a warning from the Intel compiler:

    src/textord/cjkpitch.cpp(79): warning #177:
      function "<unnamed>::SimpleStats::maximum" was declared
      but never referenced

Signed-off-by: Stefan Weil <sw@weilnetz.de>

Author: stweil

src/textord/cjkpitch.cpp

@@ -3,7 +3,6 @@
 // Description: Code to determine fixed pitchness and the pitch if fixed,
 //              for CJK text.
 // Author:      takenaka@google.com (Hiroshi Takenaka)
-// Created:     Mon Jun 27 12:48:35 JST 2011
 //
 // Copyright 2011 Google Inc. All Rights Reserved.
 // Licensed under the Apache License, Version 2.0 (the "License");
@@ -76,12 +75,6 @@ class SimpleStats {
     return ile(0.5);
   }
 
-  float maximum() {
-    if (!finalized_) Finish();
-    if (values_.empty()) return 0.0;
-    return values_.back();
-  }
-
   float minimum() {
     if (!finalized_) Finish();
     if (values_.empty()) return 0.0;