journal: remove journal_file_object_keep/release functions

The only user is sd_journal_enumerate_unique() and, as explained in
the previous commit (fed67c38e3 "journal: map objects to context set by
caller, not by actual object type"), the use of them there is now
superfluous. Let's remove them.

This reverts major parts of commits:
  ae97089d49 journal: fix access to munmapped memory in
             sd_journal_enumerate_unique
  06cc69d44c sd-journal: fix sd_journal_enumerate_unique skipping values

Tested with an "--enable-debug" build and "journalctl --list-boots".
It gives the expected number of results. Additionally, if I then revert
the previous commit ("journal: map objects to context set by caller, not
to actual object type"), it crashes with SIGSEGV, as expected.

1 files changed, 1 insertions, 6 deletions

diff --git a/src/journal/mmap-cache.h b/src/journal/mmap-cache.h
index 76e531624..3e2ffbbfd 100644
--- a/src/journal/mmap-cache.h
+++ b/src/journal/mmap-cache.h
@@ -40,12 +40,7 @@ int mmap_cache_get(
         uint64_t offset,
         size_t size,
         struct stat *st,
-        void **ret,
-        void **release_cookie);
-int mmap_cache_release(
-        MMapCache *m,
-        int fd,
-        void *release_cookie);
+        void **ret);
 void mmap_cache_close_fd(MMapCache *m, int fd);
 void mmap_cache_close_context(MMapCache *m, unsigned context);