diff --git a/2012/endoh1/Makefile.orig b/2012/endoh1/Makefile.orig
deleted file mode 100644
index 87467c850..000000000
--- a/2012/endoh1/Makefile.orig
+++ /dev/null
@@ -1,22 +0,0 @@
-# the factor of gravity
-G=1
-# the factor of pressure
-P=4
-# the factor of viscosity
-V=8
-RM= rm
-TRUE= true
-CWARN= -Wall -W -Wextra -pedantic
-CSTD= -std=c99 -D_BSD_SOURCE
-CFLAGS= ${CWARN} ${CSTD} ${ARCH} ${OPT}
-CC= gcc
-ENTRY= prog
-
-all: ${ENTRY}
-	@${TRUE}
-
-${ENTRY}: ${ENTRY}.c
-	${CC} ${CFLAGS} -DG=$G -DP=$P -DV=$P ${ENTRY}.c -o $@ -lm
-
-clean:
-	$(RM) -f ${ENTRY}
diff --git a/2019/duble/Makefile.orig b/2019/duble/Makefile.orig
deleted file mode 100644
index 16b8250eb..000000000
--- a/2019/duble/Makefile.orig
+++ /dev/null
@@ -1,33 +0,0 @@
-
-LINES=24
-COLUMNS=80
-CC=gcc
-
-CSILENCE=-Wno-incompatible-pointer-types -Wno-return-type -Wno-format-security \
-		 -Wno-bitwise-op-parentheses -Wno-logical-op-parentheses \
-		 -Wno-dangling-else -Wno-implicit-int -Wno-unused-value
-
-CFLAGS=$(CSILENCE)
-
-default:
-	$(MAKE) `uname`
-
-check-os:
-	sh check-os.sh $(LINES) $(COLUMNS)
-
-FreeBSD:
-	RAW_MODE=392 \
-	IPC_MODE=46 \
-	$(MAKE) binary
-
-Linux:
-	RAW_MODE=11 \
-	IPC_MODE=0 \
-	$(MAKE) binary
-
-binary:
-	$(CC) $(CFLAGS) -Dg=$$RAW_MODE \
-					 -Ds=$$IPC_MODE \
-					 -DV=$(LINES) \
-					 -DW=$(COLUMNS) \
-					-o prog prog.c