Fix some structurally dead code warnings

frontend/frontend_driver.c

@@ -105,16 +105,7 @@ frontend_ctx_driver_t *frontend_ctx_find_driver(const char *ident)
  **/
 frontend_ctx_driver_t *frontend_ctx_init_first(void)
 {
-   unsigned i;
+   return frontend_ctx_drivers[0];
-   frontend_ctx_driver_t *frontend = NULL;
-
-   for (i = 0; frontend_ctx_drivers[i]; i++)
-   {
-      frontend = frontend_ctx_drivers[i];
-      break;
-   }
-
-   return frontend;
 }
 
 bool frontend_driver_get_core_extension(char *s, size_t len)

gfx/video_shader_driver.c

@@ -138,15 +138,9 @@ bool video_shader_driver_deinit(void)
 /* Finds first suitable shader context driver. */
 bool video_shader_driver_init_first(void)
 {
-   unsigned i;
+   current_shader = shader_ctx_drivers[0];
-
-   for (i = 0; shader_ctx_drivers[i]; i++)
-   {
-      current_shader = shader_ctx_drivers[i];
    return true;
 }
-   return false;
-}
 
 bool video_shader_driver_init(video_shader_ctx_init_t *init)
 {

ui/ui_companion_driver.c

@@ -91,12 +91,7 @@ bool ui_companion_is_on_foreground(void)
  **/
 const ui_companion_driver_t *ui_companion_init_first(void)
 {
-   unsigned i;
+   return ui_companion_drivers[0];
-
-   for (i = 0; ui_companion_drivers[i]; i++)
-      return ui_companion_drivers[i];
-
-   return NULL;
 }
 
 const ui_companion_driver_t *ui_companion_get_ptr(void)