journal: do not check for number of files

Now that we bump rlimit, we do not really know how many files
we can open. Remove the check.

https://bugzilla.redhat.com/show_bug.cgi?id=1179980
(cherry picked from commit b914ea8d37)

src/journal/sd-journal.c

@@ -43,8 +43,6 @@
 #include "replace-var.h"
 #include "fileio.h"
 
-#define JOURNAL_FILES_MAX 1024
-
 #define JOURNAL_FILES_RECHECK_USEC (2 * USEC_PER_SEC)
 
 #define REPLACE_VAR_MAX 256
@@ -1338,11 +1336,6 @@ static int add_any_file(sd_journal *j, const char *path) {
         if (ordered_hashmap_get(j->files, path))
                 return 0;
 
-        if (ordered_hashmap_size(j->files) >= JOURNAL_FILES_MAX) {
-                log_warning("Too many open journal files, not adding %s.", path);
-                return set_put_error(j, -ETOOMANYREFS);
-        }
-
         r = journal_file_open(path, O_RDONLY, 0, false, false, NULL, j->mmap, NULL, &f);
         if (r < 0)
                 return r;