u8_textprep: move into module/zfs

Now that it's built into the main zfs module in all cases, there's no
reason to put it in its own dir.

Sponsored-by: https://despairlabs.com/sponsor/
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Closes #18071

module/Kbuild.in

@@ -216,12 +216,6 @@ NVPAIR_OBJS := \
 zfs-objs += $(addprefix nvpair/,$(NVPAIR_OBJS))
 
 
-UNICODE_OBJS := \
-	u8_textprep.o
-
-zfs-objs += $(addprefix unicode/,$(UNICODE_OBJS))
-
-
 ZCOMMON_OBJS := \
 	cityhash.o \
 	simd_stat.o \
@@ -372,6 +366,7 @@ ZFS_OBJS := \
 	space_map.o \
 	space_reftree.o \
 	txg.o \
+	u8_textprep.o \
 	uberblock.o \
 	unique.o \
 	vdev.o \

module/Makefile.bsd

@@ -230,9 +230,6 @@ SRCS+=	abd_os.c \
 	zio_crypt.c \
 	zvol_os.c
 
-#unicode
-SRCS+= 	u8_textprep.c
-
 #zcommon
 SRCS+=	cityhash.c \
 	zfeature_common.c \
@@ -322,6 +319,7 @@ SRCS+=	abd.c \
 	spa_misc.c \
 	spa_stats.c \
 	txg.c \
+	u8_textprep.c \
 	uberblock.c \
 	unique.c \
 	vdev.c \