util/cutils: Remove unused qemu_get_exec_dir

qemu_get_exec_dir has been unused since commit:
  5bebe03f51 ("util/cutils: Clean up global variable shadowing in get_relocated_path()")

Remove it, and fix up a comment that pointed to it.

Signed-off-by: Dr. David Alan Gilbert <dave@treblig.org>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

include/qemu/cutils.h

@@ -241,13 +241,10 @@ int uleb128_decode_small(const uint8_t *in, uint32_t *n);
 int qemu_pstrcmp0(const char **str1, const char **str2);
 
 /* Find program directory, and save it for later usage with
- * qemu_get_exec_dir().
+ * get_relocated_path().
  * Try OS specific API first, if not working, parse from argv0. */
 void qemu_init_exec_dir(const char *argv0);
 
-/* Get the saved exec dir.  */
-const char *qemu_get_exec_dir(void);
-
 /**
  * get_relocated_path:
  * @dir: the directory (typically a `CONFIG_*DIR` variable) to be relocated.

util/cutils.c

@@ -1144,11 +1144,6 @@ void qemu_init_exec_dir(const char *argv0)
 #endif
 }
 
-const char *qemu_get_exec_dir(void)
-{
-    return exec_dir;
-}
-
 char *get_relocated_path(const char *dir)
 {
     size_t prefix_len = strlen(CONFIG_PREFIX);