Move available namespaces to book

README.md

@@ -238,57 +238,8 @@ If neither -e, -f, or --socket-repl are specified, then the first argument that
 
 ### Built-in namespaces
 
-In addition to `clojure.core`, the following namespaces are available. Some are
+See the [built-in namespaces](https://book.babashka.org/#_built_in_namespaces)
-available through pre-defined aliases in the `user` namespace, which can be
+section in babashka book.
-handy for one-liners. If not all vars are available, they are enumerated
-explicitly. If some important var is missing, an issue or PR is welcome.
-
-From Clojure:
-
-- `clojure.core`
-- `clojure.core.protocols`: `Datafiable`, `Navigable`
-- `clojure.data`
-- `clojure.datafy`
-- `clojure.edn` aliased as `edn`
-- `clojure.java.browse`
-- `clojure.java.io` aliased as `io`:
-  - `as-relative-path`, `as-url`, `copy`, `delete-file`, `file`, `input-stream`,
-    `make-parents`, `output-stream`, `reader`, `resource`, `writer`
-- `clojure.java.shell` aliased as `shell`
-- `clojure.main`: `demunge`, `repl`, `repl-requires`
-- `clojure.pprint`: `pprint`, `cl-format`
-- `clojure.set` aliased as `set`
-- `clojure.string` aliased as `str`
-- `clojure.stacktrace`
-- `clojure.test`
-- `clojure.zip`
-
-Additional libraries:
-
-- [`babashka.curl`](https://github.com/borkdude/babashka.curl)
-- [`babashka/process`](https://github.com/babashka/process)
-- [`bencode.core`](https://github.com/nrepl/bencode) aliased as `bencode`: `read-bencode`, `write-bencode`
-- [`cheshire.core`](https://github.com/dakrone/cheshire) aliased as `json`
-- [`clojure.core.async`](https://clojure.github.io/core.async/) aliased as
-  `async`. Also see [docs](https://github.com/borkdude/babashka#coreasync).
-- [`clojure.data.csv`](https://github.com/clojure/data.csv) aliased as `csv`
-- [`clojure.data.xml`](https://github.com/clojure/data.xml) aliased as `xml`
-- [`clojure.tools.cli`](https://github.com/clojure/tools.cli) aliased as `tools.cli`
-- [`clj-yaml.core`](https://github.com/clj-commons/clj-yaml) alias as `yaml`
-- [`cognitect.transit`](https://github.com/cognitect/transit-clj) aliased as `transit`
-- [`org.httpkit.client`](https://github.com/http-kit/http-kit)
-- [`org.httpkit.server`](https://github.com/http-kit/http-kit) (experimental)
-
-See the
-[projects](https://github.com/borkdude/babashka/blob/master/doc/projects.md)
-page for libraries that are not built-in, but which you can load from source via
-the `--classpath` option.
-
-See the [build](https://github.com/borkdude/babashka/blob/master/doc/build.md)
-page for built-in libraries that can be enabled via feature flags, if you want
-to compile babashka yourself.
-
-A selection of Java classes are available, see `babashka/impl/classes.clj`.
 
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