max endstops disabled. Stock Prusa i3 Hephestos have min endstops.

Marlin/example_configurations/Hephestos/Configuration.h

 const bool Y_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of the endstop.
 const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of the endstop.
 const bool Z_MIN_PROBE_ENDSTOP_INVERTING = true; // set to true to invert the logic of the endstop.
-//#define DISABLE_MAX_ENDSTOPS
+#define DISABLE_MAX_ENDSTOPS
 //#define DISABLE_MIN_ENDSTOPS
 
 // If you want to enable the Z probe pin, but disable its use, uncomment the line below.