Remove NO_ACCURATE_DIFF options from build systems

The code no longer uses it, as we have --inaccurate-eof in
git-apply.

Signed-off-by: Eric Wong <normalperson@yhbt.net>
Signed-off-by: Junio C Hamano <junkio@cox.net>

Makefile

@@ -79,9 +79,6 @@ all:
 #
 # Define NO_ICONV if your libc does not properly support iconv.
 #
-# Define NO_ACCURATE_DIFF if your diff program at least sometimes misses
-# a missing newline at the end of the file.
-#
 # Define USE_NSEC below if you want git to care about sub-second file mtimes
 # and ctimes. Note that you need recent glibc (at least 2.2.4) for this, and
 # it will BREAK YOUR LOCAL DIFFS! show-diff and anything using it will likely
@@ -549,9 +546,6 @@ else
 endif
 endif
 endif
-ifdef NO_ACCURATE_DIFF
-	BASIC_CFLAGS += -DNO_ACCURATE_DIFF
-endif
 ifdef NO_PERL_MAKEMAKER
 	export NO_PERL_MAKEMAKER
 endif

configure.ac

@@ -235,9 +235,6 @@ AC_SUBST(NO_SETENV)
 #
 # Define NO_SYMLINK_HEAD if you never want .git/HEAD to be a symbolic link.
 # Enable it on Windows.  By default, symrefs are still used.
-#
-# Define NO_ACCURATE_DIFF if your diff program at least sometimes misses
-# a missing newline at the end of the file.
 
 ## Site configuration (override autodetection)
 ## --with-PACKAGE[=ARG] and --without-PACKAGE