readme DOC updated
diff --git a/README.md b/README.md
index 21ff29d..c938b29 100644
--- a/README.md
+++ b/README.md
@@ -35,7 +35,7 @@
* C compiler
* cmake >= 2.8.12
-* libpcre2 >= 10.30 (including devel package)
+* libpcre2 >= 10.21 (including devel package)
* note, that PCRE is supposed to be compiled with unicode support (configure's options
`--enable-utf` and `--enable-unicode-properties`)
@@ -181,22 +181,6 @@
There is also [README](./tools/lint/examples/README.md) describing some examples of
using `yanglint`.
-libyang supports YANG extensions via a plugin mechanism. Some of the plugins (for
-NACM or Metadata) are available out of the box and installed together with libyang.
-However, when libyang is not installed and `yanglint(1)` is used from the build
-directory, the plugins are not available. There are two options:
-
-1. Install libyang.
-```
-# make install
-```
-
-2. Set environment variable `LIBYANG_EXTENSIONS_PLUGINS_DIR` to contain path to the
- built extensions plugin (`./src/extensions` from the build directory).
-```
-$ LIBYANG_EXTENSIONS_PLUGINS_DIR="`pwd`/src/extensions" ./yanglint
-```
-
## Tests
libyang includes several tests built with [cmocka](https://cmocka.org/). The tests