erofs-utils: mkfs: don't force extended inodes for $SOURCE_DATE_EPOCH

After commit 59f826ca013f ("erofs-utils: mkfs: use extended inodes when
ctime is set"), there is no longer a need to set FORCE_INODE_EXTENDED.

Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20250627090938.1965634-1-hsiangkao@linux.alibaba.com
diff --git a/mkfs/main.c b/mkfs/main.c
index 14ea6ff..c266f61 100644
--- a/mkfs/main.c
+++ b/mkfs/main.c
@@ -1124,11 +1124,6 @@
 			  source_date_epoch);
 		return -EINVAL;
 	}
-
-	if (cfg.c_force_inodeversion != FORCE_INODE_EXTENDED)
-		erofs_info("SOURCE_DATE_EPOCH is set, forcely generate extended inodes instead");
-
-	cfg.c_force_inodeversion = FORCE_INODE_EXTENDED;
 	cfg.c_unix_timestamp = epoch;
 	cfg.c_timeinherit = TIMESTAMP_CLAMPING;
 	return 0;