remove banks.alt.c from 1998/banks

This file was not an alternate copy, but rather an
original version of the winning code that was
later bug fixed.

1998/banks/Makefile

@@ -179,10 +179,10 @@ PROG= ${ENTRY}
 #
 OBJ= ${PROG}.o
 DATA= bb.sc horizon.sc mountains.sc pittsburgh.sc pyramids.sc river.sc
-TARGET= ${PROG} ${PROG}.alt
+TARGET= ${PROG}
 #
-ALT_OBJ= ${PROG}.alt.o
-ALT_TARGET= ${PROG}.alt
+ALT_OBJ=
+ALT_TARGET=
 
 
 #################
@@ -199,9 +199,6 @@ all: data ${TARGET}
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LIBS}
 
-${PROG}.alt: ${PROG}.alt.c
-	${CC} ${CFLAGS} $< -o $@ ${LIBS}
-
 # alternative executable
 #
 alt: data ${ALT_TARGET}