diff --git a/docs/library/hashlib.rst b/docs/library/hashlib.rst
deleted file mode 100644
index 061f9fd1e0..0000000000
--- a/docs/library/hashlib.rst
+++ /dev/null
@@ -1,60 +0,0 @@
-:mod:`hashlib` -- hashing algorithms
-=====================================
-
-.. include:: ../templates/unsupported_in_circuitpython.inc
-
-.. module:: hashlib
-   :synopsis: hashing algorithms
-   :noindex:
-
-|see_cpython_module| :mod:`cpython:hashlib`.
-
-This module implements binary data hashing algorithms. The exact inventory
-of available algorithms depends on a board. Among the algorithms which may
-be implemented:
-
-* SHA256 - The current generation, modern hashing algorithm (of SHA2 series).
-  It is suitable for cryptographically-secure purposes. Included in the
-  MicroPython core and any board is recommended to provide this, unless
-  it has particular code size constraints.
-
-* SHA1 - A previous generation algorithm. Not recommended for new usages,
-  but SHA1 is a part of number of Internet standards and existing
-  applications, so boards targeting network connectivity and
-  interoperability will try to provide this.
-
-* MD5 - A legacy algorithm, not considered cryptographically secure. Only
-  selected boards, targeting interoperability with legacy applications,
-  will offer this.
-
-Constructors
-------------
-
-.. class:: hashlib.sha256([data])
-
-    Create an SHA256 hasher object and optionally feed ``data`` into it.
-
-.. class:: hashlib.sha1([data])
-
-    Create an SHA1 hasher object and optionally feed ``data`` into it.
-
-.. class:: hashlib.md5([data])
-
-    Create an MD5 hasher object and optionally feed ``data`` into it.
-
-Methods
--------
-
-.. method:: hash.update(data)
-
-   Feed more binary data into hash.
-
-.. method:: hash.digest()
-
-   Return hash for all data passed through hash, as a bytes object. After this
-   method is called, more data cannot be fed into the hash any longer.
-
-.. method:: hash.hexdigest()
-
-   This method is NOT implemented. Use ``binascii.hexlify(hash.digest())``
-   to achieve a similar effect.
diff --git a/docs/library/index.rst b/docs/library/index.rst
index 5d8dd3118f..b71949c2dd 100644
--- a/docs/library/index.rst
+++ b/docs/library/index.rst
@@ -19,7 +19,7 @@ limited flash memory, usually on non-Express builds:
 ``binascii``, ``errno``, ``json``, ``re``.
 
 These libraries are not currently enabled in any CircuitPython build, but may be in the future:
-``ctypes``, ``hashlib``, ``zlib``.
+``ctypes``
 
 .. toctree::
    :maxdepth: 1
@@ -31,7 +31,6 @@ These libraries are not currently enabled in any CircuitPython build, but may be
    collections.rst
    errno.rst
    gc.rst
-   hashlib.rst
    io.rst
    json.rst
    re.rst
@@ -39,7 +38,6 @@ These libraries are not currently enabled in any CircuitPython build, but may be
    asyncio.rst
    ctypes.rst
    select.rst
-   zlib.rst
 
 Omitted functions in the ``string`` library
 -------------------------------------------
diff --git a/docs/library/zlib.rst b/docs/library/zlib.rst
deleted file mode 100644
index 514b787bc4..0000000000
--- a/docs/library/zlib.rst
+++ /dev/null
@@ -1,42 +0,0 @@
-:mod:`zlib` -- zlib decompression
-=================================
-
-.. include:: ../templates/unsupported_in_circuitpython.inc
-
-.. module:: zlib
-   :synopsis: zlib decompression
-   :noindex:
-
-|see_cpython_module| :mod:`cpython:zlib`.
-
-This module allows to decompress binary data compressed with
-`DEFLATE algorithm <https://en.wikipedia.org/wiki/DEFLATE>`_
-(commonly used in zlib library and gzip archiver). Compression
-is not yet implemented.
-
-Functions
----------
-
-.. function:: decompress(data, wbits=0, bufsize=0, /)
-
-   Return decompressed *data* as bytes. *wbits* is DEFLATE dictionary window
-   size used during compression (8-15, the dictionary size is power of 2 of
-   that value). Additionally, if value is positive, *data* is assumed to be
-   zlib stream (with zlib header). Otherwise, if it's negative, it's assumed
-   to be raw DEFLATE stream. *bufsize* parameter is for compatibility with
-   CPython and is ignored.
-
-.. class:: DecompIO(stream, wbits=0, /)
-   :noindex:
-
-   Create a ``stream`` wrapper which allows transparent decompression of
-   compressed data in another *stream*. This allows to process compressed
-   streams with data larger than available heap size. In addition to
-   values described in :func:`decompress`, *wbits* may take values
-   24..31 (16 + 8..15), meaning that input stream has gzip header.
-
-   .. admonition:: Difference to CPython
-      :class: attention
-
-      This class is MicroPython extension. It's included on provisional
-      basis and may be changed considerably or removed in later versions.