Moved checks into SanityCheck.h + removed previous added checks.

Marlin/SanityCheck.h

@@ -91,6 +91,18 @@
     #error You must enable either DISPLAY_CHARSET_HD44780_JAPAN or DISPLAY_CHARSET_HD44780_WESTERN for your LCD controller.
   #endif
 
+  /**
+   * Mesh Bed Leveling
+   */
+  #ifdef MESH_BED_LEVELING
+    #ifdef DELTA
+      #error MESH_BED_LEVELING does not yet support DELTA printers
+    #endif
+    #ifdef ENABLE_AUTO_BED_LEVELING
+      #error Select ENABLE_AUTO_BED_LEVELING or MESH_BED_LEVELING, not both
+    #endif
+  #endif
+
   /**
    * Auto Bed Leveling
    */