docs: sysctl/fs: remove references to inode-max

inode-max was removed in 2.3.20pre1, remove references to it in the
sysctl documentation.
Signed-off-by: Stephen Kitt <steve@sk2.org>
Link: https://lore.kernel.org/r/20220930102937.135841-2-steve@sk2.orgSigned-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/admin-guide/sysctl/fs.rst

@@ -33,7 +33,6 @@ Currently, these files are in /proc/sys/fs:
 - dquot-nr
 - file-max
 - file-nr
-- inode-max
 - inode-nr
 - inode-state
 - nr_open
@@ -136,18 +135,12 @@ enough for most machines. Actual limit depends on RLIMIT_NOFILE
 resource limit.
 
 
-inode-max, inode-nr & inode-state
----------------------------------
+inode-nr & inode-state
+----------------------
 
 As with file handles, the kernel allocates the inode structures
 dynamically, but can't free them yet.
 
-The value in inode-max denotes the maximum number of inode
-handlers. This value should be 3-4 times larger than the value
-in file-max, since stdin, stdout and network sockets also
-need an inode struct to handle them. When you regularly run
-out of inodes, you need to increase this value.
-
 The file inode-nr contains the first two items from
 inode-state, so we'll skip to that file...
 
@@ -156,11 +149,10 @@ The actual numbers are, in order of appearance, nr_inodes,
 nr_free_inodes and preshrink.
 
 Nr_inodes stands for the number of inodes the system has
-allocated, this can be slightly more than inode-max because
-Linux allocates them one pageful at a time.
+allocated.
 
 Nr_free_inodes represents the number of free inodes (?) and
-preshrink is nonzero when the nr_inodes > inode-max and the
+preshrink is nonzero when the
 system needs to prune the inode list instead of allocating
 more.