remove --unlogged from documentation

Author: lonvia

docs/osm2pgsql.1

@@ -200,12 +200,6 @@ invalid polygons. With this option, invalid polygons are instead simply dropped
 from the database. Even without this option, all polygons in the database should
 be valid.
 .TP
-\fB\  \fR\-\-unlogged
-Use postgresql's unlogged tables for storing data. This requires PostgreSQL 9.1
-or above. Data written to unlogged tables is not written to PostgreSQL's write\-ahead log,
-which makes them considerably faster than ordinary tables. However, they are not
-crash\-safe: an unlogged table is automatically truncated after a crash or unclean shutdown.
-.TP
 \fB\  \fR\-\-number\-processes num
 Specifies the number of parallel processes used for certain operations. If disks are
 fast enough e.g. if you have an SSD, then this can greatly increase speed of

docs/usage.md

@@ -1,6 +1,6 @@
 # Command-line usage #
 
-Osm2pgsql has one program, the executable itself, which has **44** command line
+Osm2pgsql has one program, the executable itself, which has **43** command line
 options. A full list of options can be obtained with ``osm2pgsql -h -v``. This
 document provides an overview of options, and more importantly, why you might
 use them.
@@ -59,9 +59,6 @@ offers significant space savings and speed increases, particularly on
 mechanical drives. The file takes approximately 8 bytes * maximum node ID, or
 about 23 GiB, regardless of the size of the extract.
 
-``--unlogged`` specifies to use unlogged tables which are dropped from the
-database if the database server ever crashes, but are faster to import.
-
 ``--prefix`` specifies the prefix for tables
 
 ## Middle-layer options ##