Revert "PFW-1523 Implement M79 timer for PrusaLink"

This reverts commit 237db89c02.

CMakeLists.txt

@@ -182,7 +182,6 @@ set(FW_SOURCES
     Filament_sensor.cpp
     first_lay_cal.cpp
     heatbed_pwm.cpp
-    host.cpp
     la10compat.cpp
     language.c
     lcd.cpp

Firmware/Configuration_adv.h

@@ -66,9 +66,6 @@
 */
 #define AUTO_REPORT
 
-// Keepalive period which is restarted with M79
-#define M79_TIMEOUT 30 * 1000 // ms
-
 //===========================================================================
 //=============================Mechanical Settings===========================
 //===========================================================================

Firmware/Marlin_main.cpp

@@ -68,7 +68,6 @@
 #include "backlight.h"
 
 #include "planner.h"
-#include "host.h"
 #include "stepper.h"
 #include "temperature.h"
 #include "fancheck.h"
@@ -5851,20 +5850,6 @@ Sigma_Exit:
         }
         break;
     }
-
-    /*!
-    ### M79 - TODO
-    Restart the printer-host enable keepalive timer. While the timer has not expired, the printer will enable host specific features.
-    #### Usage
-
-        M79
-    #### Parameters
-       None
-    */
-    case 79:
-        M79_timer_restart();
-        break;
-
     /*!
   ### M104 - Set hotend temperature <a href="https://reprap.org/wiki/G-code#M104:_Set_Extruder_Temperature">M104: Set Extruder Temperature</a>
   #### Usage
@@ -6321,6 +6306,7 @@ Sigma_Exit:
 	case 113:
 		if (code_seen('S')) {
 			host_keepalive_interval = code_value_uint8();
+//			NOMORE(host_keepalive_interval, 60);
 		}
 		else {
 			SERIAL_ECHO_START;
@@ -9438,7 +9424,6 @@ void manage_inactivity(bool ignore_stepper_queue/*=false*/) //default argument s
   host_autoreport();
 #endif //AUTO_REPORT
   host_keepalive();
-  M79_timer_update_status();
 }
 
 void kill(const char *full_screen_message) {

Firmware/host.cpp

@@ -1,17 +0,0 @@
-#include "Configuration_adv.h"
-#include "host.h"
-#include "Timer.h"
-
-static LongTimer M79_timer;
-
-void M79_timer_restart() {
-    M79_timer.start();
-}
-
-bool M79_timer_get_status() {
-    return M79_timer.running();
-}
-
-void M79_timer_update_status() {
-    M79_timer.expired(M79_TIMEOUT);
-}

Firmware/host.h

@@ -1,12 +0,0 @@
-#pragma once
-
-/// Restart the M79 timer
-void M79_timer_restart();
-
-/// Get the current M79 timer status
-/// @returns true if running, false otherwise
-bool M79_timer_get_status();
-
-/// Checks if the timer period has expired. If the timer
-/// has expired, the timer is stopped
-void M79_timer_update_status();