Remove extraneous external/forward declarations that are duplicates of those in "xxxdefs.h" files.

modified:   src/allocmds.c
	modified:   src/array5.c
	modified:   src/car-cdr.c
	modified:   src/dbgtool.c
	modified:   src/ether.c
	modified:   src/gc2.c
	modified:   src/gcfinal.c
	modified:   src/gcmain3.c
	modified:   src/gcrcell.c
	modified:   src/initkbd.c
	modified:   src/initsout.c
	modified:   src/keyevent.c
	modified:   src/keylib.c
	modified:   src/keymaker.c
	modified:   src/keytst.c
	modified:   src/loopsops.c
	modified:   src/lsthandl.c
	modified:   src/main.c
	modified:   src/mkatom.c
	modified:   src/mkcell.c
	modified:   src/mvs.c
	modified:   src/storage.c
	modified:   src/testtool.c
	modified:   src/unixcomm.c
	modified:   src/vars3.c
	modified:   src/xc.c
	modified:   src/z2.c

src/array5.c

@@ -46,8 +46,6 @@ LispPTR N_OP_aref2(LispPTR arrayarg, LispPTR inx0, LispPTR inx1) {
   int arindex, temp;
   LispArray *arrayblk;
   int j;
-  /*	for CREATECELL  */
-  DLword *createcell68k(unsigned int type);
 
   /*  verify array  */
   if (GetTypeNumber(arrayarg) != TYPE_TWOD_ARRAY) ERROR_EXIT(inx1);