Just use the hash<sal_Int16> default

Change-Id: Ice2c0cbf382997c2d07cc8cd4a7b085a153fffef

framework/inc/stdtypes.h

@@ -38,14 +38,6 @@ namespace framework{
     Own hash functions used for stl-structures ... e.g. hash tables/maps ...
 */
 
-struct ShortHashCode
-{
-    size_t operator()( const ::sal_Int16& nShort ) const
-    {
-        return (size_t)nShort;
-    }
-};
-
 struct Int32HashCode
 {
     size_t operator()( const ::sal_Int32& nValue ) const

framework/source/inc/accelerators/keymapping.hxx

@@ -55,9 +55,7 @@ class KeyMapping
         typedef std::unordered_map<OUString, sal_Int16, OUStringHash> Identifier2CodeHash;
 
         /** @short  hash structure to map key codes to identifier. */
-        typedef std::unordered_map< sal_Int16                    ,
-                                    OUString              ,
-                                    ShortHashCode > Code2IdentifierHash;
+        typedef std::unordered_map<sal_Int16, OUString> Code2IdentifierHash;
 
     // member