helper/jim: review unused symbols

Remove unused functions:
- Jim_IdentityHashFunction
- StringAppendObj
- JimReferencesHTDoubleHashFunction

Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

src/helper/jim.c

@@ -656,12 +656,6 @@ static unsigned int Jim_IntHashFunction(unsigned int key)
     return key;
 }
 
-/* Identity hash function for integer keys */
-unsigned int Jim_IdentityHashFunction(unsigned int key)
-{
-    return key;
-}
-
 /* Generic hash function (we are using to multiply by 9 and add the byte
  * as Tcl) */
 static unsigned int Jim_GenHashFunction(const unsigned char *buf, int len)
@@ -2040,16 +2034,6 @@ static void StringAppendString(Jim_Obj *objPtr, const char *str, int len)
     objPtr->length += len;
 }
 
-/* Low-level wrapper to append an object. */
-void StringAppendObj(Jim_Obj *objPtr, Jim_Obj *appendObjPtr)
-{
-    int len;
-    const char *str;
-
-    str = Jim_GetString(appendObjPtr, &len);
-    StringAppendString(objPtr, str, len);
-}
-
 /* Higher level API to append strings to objects. */
 void Jim_AppendString(Jim_Interp *interp, Jim_Obj *objPtr, const char *str,
         int len)
@@ -4029,14 +4013,6 @@ static unsigned int JimReferencesHTHashFunction(const void *key)
     return Jim_IntHashFunction(intValue);
 }
 
-unsigned int JimReferencesHTDoubleHashFunction(const void *key)
-{
-    /* Only the least significant bits are used. */
-    const jim_wide *widePtr = key;
-    unsigned int intValue = (unsigned int) *widePtr;
-    return intValue; /* identity function. */
-}
-
 static const void *JimReferencesHTKeyDup(void *privdata, const void *key)
 {
     void *copy = Jim_Alloc(sizeof(jim_wide));