Remove useless set_user_name function

[yanazaeva]

Related issue
#12144

Description

This closes #12144. The goal of this pull is to remove the unused set_user_function from the middlewares.py file, as this function is no longer useful:

wazuh/api/api/middlewares.py

Lines 30 to 34 in 245f82f

	@web.middleware
	async def set_user_name(request, handler):
	if 'token_info' in request:
	request['user'] = request['token_info']['sub']
	return await handler(request)

[vicferpoy]

LGTM

[davidjiglesias]

We need to manually test the log status with the most common use cases after this change.

[Selutario]

Manual tests

I have tested multiple endpoints after the changes performed in this PR and all responses were correct. These things were checked:

• No strange behavior in API.
• Info and debug logs do not show anything weird.
• Run_as in Kibana working as expected.

As mentioned above, there are no error logs in the api.log:

2022/04/20 07:47:14 INFO: wazuh 172.19.0.1 "GET /security/user/authenticate" with parameters {} and body {} done in 0.470s: 200
2022/04/20 07:47:23 INFO: wazuh 172.19.0.1 "GET /agents" with parameters {} and body {} done in 0.049s: 200
2022/04/20 07:47:39 INFO: wazuh 172.19.0.1 "POST /agents" with parameters {} and body {"name": "test_agent", "ip": "any", "force_time": 0} done in 0.007s: 400
2022/04/20 07:47:50 INFO: wazuh 172.19.0.1 "POST /agents" with parameters {} and body {"name": "test_agent", "ip": "any"} done in 0.015s: 200
2022/04/20 07:48:11 INFO: wazuh 172.19.0.1 "GET /agents/001/key" with parameters {} and body {} done in 0.011s: 200
2022/04/20 07:48:22 INFO: wazuh 172.19.0.1 "GET /security/user/authenticate" with parameters {} and body {} done in 0.466s: 200
2022/04/20 07:48:22 INFO: wazuh 172.19.0.1 "PUT /agents/001/restart" with parameters {} and body {} done in 0.044s: 200
2022/04/20 07:48:36 INFO: wazuh 172.19.0.1 "GET /agents/no_group" with parameters {} and body {} done in 0.011s: 200
2022/04/20 07:51:25 INFO: wazuh 172.19.0.1 "GET /security/user/authenticate" with parameters {} and body {} done in 0.465s: 200
2022/04/20 07:51:25 INFO: wazuh 172.19.0.1 "GET /agents/outdated" with parameters {} and body {} done in 0.040s: 200
2022/04/20 07:51:40 INFO: wazuh 172.19.0.1 "GET /agents/stats/distinct" with parameters {} and body {} done in 0.014s: 200
2022/04/20 07:52:04 INFO: wazuh 172.19.0.1 "GET /agents/summary/os" with parameters {} and body {} done in 0.011s: 200
2022/04/20 07:52:07 INFO: wazuh 172.19.0.1 "GET /decoders" with parameters {} and body {} done in 0.358s: 200
2022/04/20 07:52:13 INFO: wazuh 172.19.0.1 "GET /decoders/files" with parameters {} and body {} done in 0.275s: 200
2022/04/20 07:52:46 INFO: wazuh 172.19.0.1 "GET /security/user/authenticate" with parameters {} and body {} done in 0.479s: 200
2022/04/20 07:52:46 INFO: wazuh 172.19.0.1 "GET /decoders/files/0005-wazuh_decoders.xml" with parameters {"raw": "true"} and body {} done in 0.043s: 200
2022/04/20 07:53:18 INFO: wazuh 172.19.0.1 "DELETE /decoders/files/0005-wazuh_decoders.xml" with parameters {} and body {} done in 0.009s: 200
2022/04/20 07:55:19 INFO: wazuh 172.19.0.1 "GET /security/user/authenticate" with parameters {} and body {} done in 0.461s: 200
2022/04/20 07:55:20 INFO: wazuh 172.19.0.1 "PUT /decoders/files/test_decoder.xml" with parameters {} and body {} done in 0.035s: 406
2022/04/20 07:55:28 INFO: wazuh 172.19.0.1 "PUT /decoders/files/test_decoder.xml" with parameters {} and body {} done in 0.011s: 200
2022/04/20 07:56:03 INFO: wazuh 172.19.0.1 "GET /cluster/api/config" with parameters {} and body {} done in 0.031s: 200
2022/04/20 07:56:21 INFO: wazuh 172.19.0.1 "GET /security/user/authenticate" with parameters {} and body {} done in 0.470s: 200
2022/04/20 07:56:21 INFO: wazuh 172.19.0.1 "GET /manager/status" with parameters {} and body {} done in 0.039s: 200
2022/04/20 07:56:27 INFO: wazuh 172.19.0.1 "GET /manager/configuration/validation" with parameters {} and body {} done in 0.930s: 200
2022/04/20 07:56:32 INFO: wazuh 172.19.0.1 "GET /mitre/mitigations" with parameters {} and body {} done in 0.255s: 200
2022/04/20 07:56:36 INFO: wazuh 172.19.0.1 "PUT /rootcheck" with parameters {} and body {} done in 0.013s: 200
2022/04/20 07:56:52 INFO: wazuh 172.19.0.1 "GET /rootcheck/000/last_scan" with parameters {} and body {} done in 0.014s: 200
2022/04/20 07:56:57 INFO: wazuh 172.19.0.1 "DELETE /rootcheck/000" with parameters {} and body {} done in 0.015s: 200
2022/04/20 07:57:03 INFO: wazuh 172.19.0.1 "GET /overview/agents" with parameters {} and body {} done in 0.021s: 200
2022/04/20 07:59:23 INFO: wazuh 172.19.0.1 "GET /security/user/authenticate" with parameters {} and body {} done in 0.476s: 200
2022/04/20 07:59:24 INFO: wazuh 172.19.0.1 "GET /rules" with parameters {} and body {} done in 0.877s: 200
2022/04/20 07:59:26 INFO: wazuh 172.19.0.1 "GET /rules/groups" with parameters {} and body {} done in 0.805s: 200
2022/04/20 07:59:34 INFO: wazuh 172.19.0.1 "DELETE /rules/files/local_rules.xml" with parameters {} and body {} done in 0.011s: 200
2022/04/20 07:59:45 INFO: wazuh 172.19.0.1 "GET /sca/000" with parameters {} and body {} done in 0.018s: 200
2022/04/20 08:00:03 INFO: wazuh 172.19.0.1 "DELETE /security/user/authenticate" with parameters {} and body {} done in 0.029s: 200
2022/04/20 08:00:13 INFO: wazuh 172.19.0.1 "GET /security/user/authenticate" with parameters {} and body {} done in 0.600s: 200
2022/04/20 08:00:20 INFO: wazuh 172.19.0.1 "GET /security/users/me/policies" with parameters {} and body {} done in 0.034s: 200
2022/04/20 08:00:27 INFO: wazuh 172.19.0.1 "PUT /security/user/revoke" with parameters {} and body {} done in 1.293s: 200
2022/04/20 08:00:32 INFO: unknown_user 172.19.0.1 "GET /security/actions" with parameters {} and body {} done in 0.002s: 401
2022/04/20 08:00:37 INFO: unknown_user 172.19.0.1 "GET /security/resources" with parameters {} and body {} done in 0.002s: 401
2022/04/20 08:00:39 INFO: unknown_user 172.19.0.1 "GET /security/users" with parameters {} and body {} done in 0.003s: 401
2022/04/20 08:00:52 INFO: wazuh 172.19.0.1 "GET /security/user/authenticate" with parameters {} and body {} done in 0.483s: 200
2022/04/20 08:01:04 INFO: wazuh 172.19.0.1 "DELETE /security/user/authenticate" with parameters {} and body {} done in 0.051s: 200
2022/04/20 08:01:09 INFO: unknown_user 172.19.0.1 "GET /security/users/me" with parameters {} and body {} done in 0.016s: 401
2022/04/20 08:01:12 INFO: wazuh 172.19.0.1 "POST /security/user/authenticate/run_as" with parameters {} and body {} done in 0.468s: 200
2022/04/20 08:01:19 INFO: unknown_user 172.19.0.1 "POST /security/roles" with parameters {} and body {"name": "test_role"} done in 0.004s: 401
2022/04/20 08:01:24 INFO: wazuh 172.19.0.1 "GET /security/user/authenticate" with parameters {} and body {} done in 0.515s: 200
2022/04/20 08:01:26 INFO: wazuh 172.19.0.1 "POST /security/roles" with parameters {} and body {"name": "test_role"} done in 0.049s: 200
2022/04/20 08:01:55 INFO: wazuh 172.19.0.1 "PUT /security/roles/test_role" with parameters {} and body {"name": "new_test_role"} done in 0.008s: 400
2022/04/20 08:02:04 INFO: wazuh 172.19.0.1 "PUT /security/roles/100" with parameters {} and body {"name": "new_test_role"} done in 0.033s: 200
2022/04/20 08:02:16 INFO: wazuh 172.19.0.1 "DELETE /security/roles" with parameters {"role_ids": "100"} and body {} done in 0.067s: 200
2022/04/20 08:02:29 INFO: wazuh 172.19.0.1 "GET /security/user/authenticate" with parameters {} and body {} done in 0.471s: 200
2022/04/20 08:02:29 INFO: wazuh 172.19.0.1 "GET /syscheck/000" with parameters {} and body {} done in 0.112s: 200