removed some outdated remarks

c64/basic/basic_shift_mem_down.s

@@ -3,9 +3,6 @@
 // #LAYOUT# *   *       #IGNORE
 
 
-// XXX review this code - for memory models below 60k this can probably be simplified
-
-
 basic_shift_mem_down_and_relink:
 	// Shift memory down to basic_current_line_pointer
 	// from X bytes further along.

c64/basic/basic_shift_mem_up.s

@@ -3,9 +3,6 @@
 // #LAYOUT# *   *       #IGNORE
 
 
-// XXX review this code - for memory models below 60k this can probably be simplified
-
-
 basic_shift_mem_up_and_relink:
 	// Shift memory up from OLDTXT
 	// X bytes.

c64/basic/select_device.s

@@ -3,7 +3,7 @@
 // #LAYOUT# *   *       #IGNORE
 
 
-select_device: // XXX check usage, probably more can be put into this common section
+select_device:
 
 	// Take last device number, make sure it is a drive - 8 or above. Above 30,
 	// although illegal for IEC we also consider a drive, as they exists