Remove useless code in example [libgpiod]

[Rostyslav Lobov <rostislavlobov.k@gmail.com>]

[-- Attachment #1: Type: text/plain, Size: 292 bytes --]

Hello, I noticed that `libgpiod/examples/reconfigure_input_to_output.c`
has some useless declaration `struct gpiod_request_config *req_cfg =
NULL;` and later free `gpiod_request_config_free(req_cfg);` of the
variable which is never used...
So I'm attaching a fix patch.
Rostyslav Lobov

[-- Attachment #2: remove_useless.patch --]
[-- Type: text/x-patch, Size: 779 bytes --]

diff --git a/examples/reconfigure_input_to_output.c b/examples/reconfigure_input_to_output.c
index 451bb0e..734a99c 100644
--- a/examples/reconfigure_input_to_output.c
+++ b/examples/reconfigure_input_to_output.c
@@ -71,7 +71,6 @@ static int reconfigure_as_output_line(struct gpiod_line_request *request,
 				      unsigned int offset,
 				      enum gpiod_line_value value)
 {
-	struct gpiod_request_config *req_cfg = NULL;
 	struct gpiod_line_settings *settings;
 	struct gpiod_line_config *line_cfg;
 	int ret = -1;
@@ -95,8 +94,6 @@ static int reconfigure_as_output_line(struct gpiod_line_request *request,
 
 	ret = gpiod_line_request_reconfigure_lines(request, line_cfg);
 
-	gpiod_request_config_free(req_cfg);
-
 free_line_config:
 	gpiod_line_config_free(line_cfg);