[glibmm] Value: Remove the CType alias.

[Murray Cumming <murrayc src gnome org>]

commit b5bfd79ab38bcf2794f5255d19a18d61638668af
Author: Murray Cumming <murrayc murrayc com>
Date:   Sun Apr 9 10:45:07 2017 +0200

    Value: Remove the CType alias.
    
    This should not be necessary. Anything that uses it could hopefully
    use auto instead.
    
    This avoids the problem of the Value<RefPtr> specialization assuming
    that the RefPtr holds a Glib::ObjectBase-derived typed.

 glib/glibmm/value.h            |    8 +-------
 glib/glibmm/value_custom.h     |    2 --
 glib/src/value_basictypes.h.m4 |    1 -
 3 files changed, 1 insertions(+), 10 deletions(-)
---
diff --git a/glib/glibmm/value.h b/glib/glibmm/value.h
index f4ef49f..9afc426 100644
--- a/glib/glibmm/value.h
+++ b/glib/glibmm/value.h
@@ -140,7 +140,6 @@ protected:
 class ValueBase_Enum : public ValueBase
 {
 public:
-  using CType = gint;
   static GType value_type() G_GNUC_CONST;
 
 #ifndef DOXYGEN_SHOULD_SKIP_THIS
@@ -161,7 +160,6 @@ protected:
 class ValueBase_Flags : public ValueBase
 {
 public:
-  using CType = guint;
   static GType value_type() G_GNUC_CONST;
 
 #ifndef DOXYGEN_SHOULD_SKIP_THIS
@@ -182,7 +180,6 @@ protected:
 class ValueBase_String : public ValueBase
 {
 public:
-  using CType = const gchar*;
   static GType value_type() G_GNUC_CONST;
 
 #ifndef DOXYGEN_SHOULD_SKIP_THIS
@@ -216,12 +213,11 @@ class Value_Boxed : public ValueBase_Boxed
 {
 public:
   using CppType = T;
-  using CType = typename T::BaseObjectType*;
 
   static GType value_type() { return T::get_type(); }
 
   void set(const CppType& data) { set_boxed(data.gobj()); }
-  CppType get() const { return CppType(static_cast<CType>(get_boxed())); }
+  CppType get() const { return CppType(static_cast<typename T::BaseObjectType*>(get_boxed())); }
 };
 
 // More spec-compliant compilers (such as Tru64) need this to be near Glib::Object instead.
@@ -235,7 +231,6 @@ class Value<Glib::RefPtr<T>> : public ValueBase_Object
 {
 public:
   using CppType = Glib::RefPtr<T>;
-  using CType = typename T::BaseObjectType*;
 
   static GType value_type() { return T::get_base_type(); }
 
@@ -254,7 +249,6 @@ class Value<Glib::RefPtr<const T>> : public ValueBase_Object
 {
 public:
   using CppType = Glib::RefPtr<const T>;
-  using CType = typename T::BaseObjectType*;
 
   static GType value_type() { return T::get_base_type(); }
 
diff --git a/glib/glibmm/value_custom.h b/glib/glibmm/value_custom.h
index d3ebfee..98e8a0f 100644
--- a/glib/glibmm/value_custom.h
+++ b/glib/glibmm/value_custom.h
@@ -62,7 +62,6 @@ class Value_Pointer : public ValueBase_Object
 {
 public:
   using CppType = PtrT;
-  using CType = void*;
 
   static inline GType value_type() G_GNUC_CONST;
 
@@ -101,7 +100,6 @@ class Value : public ValueBase_Boxed
 {
 public:
   using CppType = T;
-  using CType = T*;
 
   static GType value_type() G_GNUC_CONST;
 
diff --git a/glib/src/value_basictypes.h.m4 b/glib/src/value_basictypes.h.m4
index e4b5885..56097ac 100644
--- a/glib/src/value_basictypes.h.m4
+++ b/glib/src/value_basictypes.h.m4
@@ -34,7 +34,6 @@ class Value<$1> : public ValueBase
 {
 public:
   using CppType = $1;
-  using CType = g$2;
 
   static GType value_type() G_GNUC_CONST;