Revert "[API] Add check_auth function with json output"

This reverts commit b2168badd9.

application/controllers/Api.php

@@ -127,29 +127,6 @@ class API extends CI_Controller {
 		}
 	}
 
-	function check_auth($key) {
-		$this->load->model('api_model');
-			header("Content-type: text/xml");
-		if($this->api_model->access($key) == "No Key Found" || $this->api_model->access($key) == "Key Disabled") {
-			// set the content type as json
-			header("Content-type: application/json");
-
-			// set the http response code to 401
-			http_response_code(401);
-
-			// return the json with the status as failed
-			echo json_encode(['status' => 'failed', 'reason' => "missing or invalid api key"]);
-		} else {
-			// set the content type as json
-			header("Content-type: application/json");
-
-			// set the http response code to 200
-			http_response_code(200);
-			// return the json
-			echo json_encode(['status' => 'valid', 'rights' => $this->api_model->access($key)]);
-		}
-	}
-
 	function station_info($key) {
 		$this->load->model('api_model');
 		$this->load->model('stations');