Drop DISABLE_M(IN|AX)_ENDSTOPS, replace with individual endstop flags

This is follow-up the commit e5771346a4.
Update unnoticed files.

Marlin/example_configurations/Hephestos_2/Configuration.h

 // Enable this option for Toshiba steppers
 //#define CONFIG_STEPPERS_TOSHIBA
 
+//===========================================================================
+//============================== Endstop Settings ===========================
+//===========================================================================
+
 // @section homing
 
+// Specify here all the endstop connectors that are connected to any endstop or probe.
+// Almost all printers will be using one per axis. Probes will use one or more of the
+// extra connectors. Leave undefined any used for non-endstop and non-probe purposes.
+#define USE_XMIN_PLUG
+#define USE_YMIN_PLUG
+#define USE_ZMIN_PLUG
+//#define USE_XMAX_PLUG
+//#define USE_YMAX_PLUG
+//#define USE_ZMAX_PLUG
+
 // coarse Endstop Settings
 #define ENDSTOPPULLUPS // Comment this out (using // at the start of the line) to disable the endstop pullup resistors
 
 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 = false; // set to true to invert the logic of the endstop.
-#define DISABLE_MAX_ENDSTOPS
-//#define DISABLE_MIN_ENDSTOPS
 
 //===========================================================================
 //============================= Z Probe Options =============================

Marlin/example_configurations/delta/kossel_xl/Configuration.h

 // Enable this option for Toshiba steppers
 //#define CONFIG_STEPPERS_TOSHIBA
 
+//===========================================================================
+//============================== Endstop Settings ===========================
+//===========================================================================
+
 // @section homing
 
+// Specify here all the endstop connectors that are connected to any endstop or probe.
+// Almost all printers will be using one per axis. Probes will use one or more of the
+// extra connectors. Leave undefined any used for non-endstop and non-probe purposes.
+//#define USE_XMIN_PLUG
+//#define USE_YMIN_PLUG
+#define USE_ZMIN_PLUG // a Z probe
+#define USE_XMAX_PLUG
+#define USE_YMAX_PLUG
+#define USE_ZMAX_PLUG
+
 // coarse Endstop Settings
 //#define ENDSTOPPULLUPS // Comment this out (using // at the start of the line) to disable the endstop pullup resistors
 
 const bool Y_MAX_ENDSTOP_INVERTING = false; // set to true to invert the logic of the endstop.
 const bool Z_MAX_ENDSTOP_INVERTING = false; // set to true to invert the logic of the endstop.
 const bool Z_MIN_PROBE_ENDSTOP_INVERTING = false; // set to true to invert the logic of the endstop.
-//#define DISABLE_MAX_ENDSTOPS
-//#define DISABLE_MIN_ENDSTOPS
 
 //===========================================================================
 //============================= Z Probe Options =============================