[glom] Combo_FieldType: Remove an unused predicate class.

[Murray Cumming <murrayc src gnome org>]

commit 76378c5b8bf87a70b28820dbcb63f08576a85cd4
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue Jul 21 08:35:21 2015 +0200

    Combo_FieldType: Remove an unused predicate class.

 glom/mode_design/fields/combo_fieldtype.h |   27 ---------------------------
 1 files changed, 0 insertions(+), 27 deletions(-)
---
diff --git a/glom/mode_design/fields/combo_fieldtype.h b/glom/mode_design/fields/combo_fieldtype.h
index c02d73a..7227316 100644
--- a/glom/mode_design/fields/combo_fieldtype.h
+++ b/glom/mode_design/fields/combo_fieldtype.h
@@ -29,33 +29,6 @@
 namespace Glom
 {
 
-//Predicate for use with algorithms with maps.
-template<class T_map>
-class pred_mapPair_HasValue
-{
-public:
-  typedef typename T_map::mapped_type type_value;   //earlier versions of gcc had data_type instead of 
mapped_type.
-  typedef std::pair<typename T_map::key_type, type_value> type_pair;
-
-  pred_mapPair_HasValue(type_value valueToFind)
-  {
-    m_valueToFind = valueToFind;
-  }
-
-  virtual ~pred_mapPair_HasValue()
-  {
-  }
-
-  bool operator()(const type_pair& item) const
-  {
-    return item.second == m_valueToFind;
-  }
-
-private:
-  type_value m_valueToFind;
-};
-
-
 class Combo_FieldType : public Gtk::ComboBox
 {
 public: