Actually call UnconditionalStop() in Stop()->lcd_print_stop()

Remove incorrect check introduced during development.

Firmware/ultralcd.cpp

@@ -7088,13 +7088,10 @@ static void lcd_sd_updir()
 
 void lcd_print_stop()
 {
-    if (!IsStopped()) {
-        // Stop the print if we didn't already due to an error
     if (!card.sdprinting) {
         SERIAL_ECHOLNRPGM(MSG_OCTOPRINT_CANCEL); // for Octoprint
     }
     UnconditionalStop();
-    }
 
     // TODO: all the following should be moved in the main marlin loop!
 #ifdef MESH_BED_LEVELING