remove the unused files interpolate.c and interpolate.h

Signed-off-by: Rene Scharfe <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: René Scharfe

Makefile

@@ -437,7 +437,6 @@ LIB_OBJS += grep.o
 LIB_OBJS += hash.o
 LIB_OBJS += help.o
 LIB_OBJS += ident.o
-LIB_OBJS += interpolate.o
 LIB_OBJS += levenshtein.o
 LIB_OBJS += list-objects.o
 LIB_OBJS += ll-merge.o