Single envs for specific boards

Marlin/src/pins/pins.h

 #elif MB(BAM_DICE_DUE)
   #include "ramps/pins_BAM_DICE_DUE.h"          // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
 #elif MB(MKS_BASE)
-  #include "ramps/pins_MKS_BASE_10.h"           // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_MKS_BASE_10.h"           // ATmega2560                             env:megaatmega2560
 #elif MB(MKS_BASE_14)
   #include "ramps/pins_MKS_BASE_14.h"           // ATmega2560                             env:megaatmega2560
 #elif MB(MKS_BASE_15)
-  #include "ramps/pins_MKS_BASE_15.h"           // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_MKS_BASE_15.h"           // ATmega2560                             env:megaatmega2560
 #elif MB(MKS_BASE_16)
-  #include "ramps/pins_MKS_BASE_16.h"           // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_MKS_BASE_16.h"           // ATmega2560                             env:megaatmega2560
 #elif MB(MKS_BASE_HEROIC)
-  #include "ramps/pins_MKS_BASE_HEROIC.h"       // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_MKS_BASE_HEROIC.h"       // ATmega2560                             env:megaatmega2560
 #elif MB(MKS_GEN_13)
   #include "ramps/pins_MKS_GEN_13.h"            // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
 #elif MB(MKS_GEN_L)