Remove references to bundled mbedtls library to use the one from inputs.

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1e27d21..f0eb1a5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -85,13 +85,6 @@ endif()
 
 set(USE_STATIC_MBEDTLS_LIBRARY ON)
 set(USE_SHARED_MBEDTLS_LIBRARY OFF)
-add_subdirectory("lib/mbedtls" EXCLUDE_FROM_ALL)
-
-# Compile the mbedtls library as a static with position independent code,
-# because we need it for both a shared and static library
-set_property(TARGET mbedtls PROPERTY POSITION_INDEPENDENT_CODE ON)
-set_property(TARGET mbedcrypto PROPERTY POSITION_INDEPENDENT_CODE ON)
-set_property(TARGET mbedx509 PROPERTY POSITION_INDEPENDENT_CODE ON)
 
 add_subdirectory(src)
 
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<div class='path'>path: <a href='/guix/log/?id=c6f3cb5f03e74c54e6dda527045aec91d70feb4e'>root</a>/<a href='/guix/log/etc?id=c6f3cb5f03e74c54e6dda527045aec91d70feb4e'>etc</a>/<a href='/guix/log/etc/indent-code.el?id=c6f3cb5f03e74c54e6dda527045aec91d70feb4e'>indent-code.el</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/etc/indent-code.el?id=c6f3cb5f03e74c54e6dda527045aec91d70feb4e&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-06-12 10:26:02 +0200'>2021-06-12</span></td><td><a href='/guix/commit/etc/indent-code.el?id=0b17dc4aaea85bf0e35184909914f81761fedf56'>etc: indent-code.el: Remove any existing tabs.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/indent-code.el (main): Call UNTABIFY on the sexp or entire buffer.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-08-18 23:54:55 +0200'>2020-08-18</span></td><td><a href='/guix/commit/etc/indent-code.el?id=275e66b8b47a6e085a6f359b69af424bc9f6b13d'>etc: indent-code.el: Match not only ‘(define-public’.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/indent-code.el (main): Also match ‘(define’, as intended.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-05-14 23:05:42 -0400'>2020-05-14</span></td><td><a href='/guix/commit/etc/indent-code.el?id=cb21ae76714f1873d3b3fb40d5135f00ec104b85'>etc: indent-code.el: Use the --quick option.</a><span class='msg-avail'>...<span class='msg-tooltip'>This prevents Emacs from loading the autoload definitions found in its
profile, which needlessly clutters the output.  It also prevents Geiser (if
installed) from blocking the script and asking the user to input the Scheme
implementation to use.

The trick for passing multiple arguments to Emacs is to use what is called a
"sesquicolon" (see https://www.emacswiki.org/emacs/EmacsScripts).

* etc/indent-code.el.in: Rename to...
* etc/indent-code.el: ...this.  Adapt the shebang to use a sesquicolon, and
pass the --quick option to Emacs.  Since this line is interpreted by the
shell, simply use Emacs from the PATH instead of from a hard coded location.
(main): New procedure, used as the entry point.
* configure.ac: Remove the warning about Emacs.  Emacs can now be installed
any time by the user if they want to use the script.
* .gitignore: No longer ignore changes to etc/indent-code.el.
</span></span></td><td>Maxim Cournoyer</td></tr>