diff --git a/README.org b/README.org
index 595175a..d87b890 100644
--- a/README.org
+++ b/README.org
@@ -2598,183 +2598,6 @@ def __org_babel_python_format_value(result, result_file, result_params):
                   ("\\subsubsection{%s}" . "\\subsubsection*{%s}")))))))
 #+end_src
 
-*** Org HTML style default
-:PROPERTIES:
-:CUSTOM_ID: sec:org-html-style-default
-:END:
-
-Set ~org-html-style-default~ option to clean up the selection of languages and
-to add =HTML+CSS+JS= for ~mhtml-mode~:
-#+begin_src emacs-lisp -n :eval never :results silent
-(setopt org-html-style-default "<style>
-  #content { max-width: 60em; margin: auto; }
-  .title  { text-align: center;
-             margin-bottom: .2em; }
-  .subtitle { text-align: center;
-              font-size: medium;
-              font-weight: bold;
-              margin-top:0; }
-  .todo   { font-family: monospace; color: red; }
-  .done   { font-family: monospace; color: green; }
-  .priority { font-family: monospace; color: orange; }
-  .tag    { background-color: #eee; font-family: monospace;
-            padding: 2px; font-size: 80%; font-weight: normal; }
-  .timestamp { color: #bebebe; }
-  .timestamp-kwd { color: #5f9ea0; }
-  .org-right  { margin-left: auto; margin-right: 0px;  text-align: right; }
-  .org-left   { margin-left: 0px;  margin-right: auto; text-align: left; }
-  .org-center { margin-left: auto; margin-right: auto; text-align: center; }
-  .underline { text-decoration: underline; }
-  #postamble p, #preamble p { font-size: 90%; margin: .2em; }
-  p.verse { margin-left: 3%; }
-  pre {
-    border: 1px solid #e6e6e6;
-    border-radius: 3px;
-    background-color: #f2f2f2;
-    padding: 8pt;
-    font-family: monospace;
-    overflow: auto;
-    margin: 1.2em;
-  }
-  pre.src {
-    position: relative;
-    overflow: auto;
-  }
-  pre.src:before {
-    display: none;
-    position: absolute;
-    top: -8px;
-    right: 12px;
-    padding: 3px;
-    color: #555;
-    background-color: #f2f2f299;
-  }
-  pre.src:hover:before { display: inline; margin-top: 14px;}
-  /* Language selection start. */
-  pre.src-asm:before { content: 'Assembler'; }
-  pre.src-asymptote:before { content: 'Asymptote'; }
-  pre.src-awk:before { content: 'Awk'; }
-  pre.src-C:before { content: 'C'; }
-  /* pre.src-C++ doesn't work in CSS */
-  pre.src-calc:before { content: 'Emacs Calc'; }
-  pre.src-clojure:before { content: 'Clojure'; }
-  pre.src-conf:before { content: 'Configuration File'; }
-  pre.src-cpp:before  { content: 'C++'; }
-  pre.src-css:before { content: 'CSS'; }
-  pre.src-D:before { content: 'D'; }
-  pre.src-delphi:before { content: 'Delphi'; }
-  pre.src-ditaa:before { content: 'ditaa'; }
-  pre.src-dot:before { content: 'Graphviz'; }
-  pre.src-emacs-lisp:before { content: 'Emacs Lisp'; }
-  pre.src-fortran:before { content: 'Fortran'; }
-  pre.src-gnuplot:before { content: 'gnuplot'; }
-  pre.src-haskell:before { content: 'Haskell'; }
-  pre.src-html:before { content: 'HTML'; }
-  pre.src-idl:before { content: 'IDL'; }
-  pre.src-J:before { content: 'J'; }
-  pre.src-java:before { content: 'Java'; }
-  pre.src-js:before { content: 'Javascript'; }
-  pre.src-latex:before { content: 'LaTeX'; }
-  pre.src-ledger:before { content: 'Ledger'; }
-  pre.src-lisp:before { content: 'Lisp'; }
-  pre.src-lilypond:before { content: 'Lilypond'; }
-  pre.src-lua:before { content: 'Lua'; }
-  pre.src-makefile:before { content: 'Makefile'; }
-  pre.src-matlab:before { content: 'MATLAB'; }
-  pre.src-maxima:before { content: 'Maxima'; }
-  pre.src-mercury:before { content: 'Mercury'; }
-  pre.src-metapost:before { content: 'MetaPost'; }
-  pre.src-mhtml:before { content: 'HTML+CSS+JS'; }
-  pre.src-modula-2:before { content: 'Modula-2'; }
-  pre.src-nxml:before { content: 'XML'; }
-  pre.src-ocaml:before { content: 'Objective Caml'; }
-  pre.src-octave:before { content: 'Octave'; }
-  pre.src-org:before { content: 'Org mode'; }
-  pre.src-pascal:before { content: 'Pascal'; }
-  pre.src-perl:before { content: 'Perl'; }
-  pre.src-plain-tex:before { content: 'Plain TeX'; }
-  pre.src-plantuml:before { content: 'Plantuml'; }
-  pre.src-processing:before { content: 'Processing.js'; }
-  pre.src-prolog:before { content: 'Prolog'; }
-  pre.src-ps:before { content: 'PostScript'; }
-  pre.src-python:before { content: 'Python'; }
-  pre.src-R:before { content: 'R'; }
-  pre.src-ruby:before { content: 'Ruby'; }
-  pre.src-sass:before { content: 'Sass'; }
-  pre.src-scala:before { content: 'Scala'; }
-  pre.src-scheme:before { content: 'Scheme'; }
-  pre.src-screen:before { content: 'Gnu Screen'; }
-  pre.src-sed:before { content: 'Sed'; }
-  pre.src-sh:before { content: 'shell'; }
-  pre.src-simula:before { content: 'Simula'; }
-  pre.src-sql:before { content: 'SQL'; }
-  pre.src-sqlite:before { content: 'SQLite'; }
-  pre.src-tcl:before { content: 'tcl'; }
-  pre.src-tex:before { content: 'TeX'; }
-  pre.src-verilog:before { content: 'Verilog'; }
-  pre.src-vhdl:before { content: 'VHDL'; }
-  pre.src-xml:before { content: 'XML'; }
-  /* ob-shell and sub-shells. */
-  pre.src-shell:before { content: 'Shell Script'; }
-  pre.src-bash:before  { content: 'bash'; }
-  pre.src-csh:before  { content: 'csh'; }
-  pre.src-ash:before  { content: 'ash'; }
-  pre.src-dash:before  { content: 'dash'; }
-  pre.src-ksh:before  { content: 'ksh'; }
-  pre.src-mksh:before  { content: 'mksh'; }
-  pre.src-posh:before  { content: 'posh'; }
-  pre.src-zsh:before  { content: 'zsh'; }
-  /* Language selection end. */
-
-  table { border-collapse:collapse; }
-  caption.t-above { caption-side: top; }
-  caption.t-bottom { caption-side: bottom; }
-  td, th { vertical-align:top;  }
-  th.org-right  { text-align: center;  }
-  th.org-left   { text-align: center;   }
-  th.org-center { text-align: center; }
-  td.org-right  { text-align: right;  }
-  td.org-left   { text-align: left;   }
-  td.org-center { text-align: center; }
-  dt { font-weight: bold; }
-  .footpara { display: inline; }
-  .footdef  { margin-bottom: 1em; }
-  .figure { padding: 1em; }
-  .figure p { text-align: center; }
-  .equation-container {
-    display: table;
-    text-align: center;
-    width: 100%;
-  }
-  .equation {
-    vertical-align: middle;
-  }
-  .equation-label {
-    display: table-cell;
-    text-align: right;
-    vertical-align: middle;
-  }
-  .inlinetask {
-    padding: 10px;
-    border: 2px solid gray;
-    margin: 10px;
-    background: #ffffcc;
-  }
-  #org-div-home-and-up
-   { text-align: right; font-size: 70%; white-space: nowrap; }
-  textarea { overflow-x: auto; }
-  .linenr { font-size: smaller }
-  .code-highlighted { background-color: #ffff00; }
-  .org-info-js_info-navigation { border-style: none; }
-  #org-info-js_console-label
-    { font-size: 10px; font-weight: bold; white-space: nowrap; }
-  .org-info-js_search-highlight
-    { background-color: #ffff00; color: #000000; font-weight: bold; }
-  .org-svg { }
-</style>"
-)
-#+end_src
-
 *** [[info:org#In-buffer Settings][Buffer properties]]
 :PROPERTIES:
 :CUSTOM_ID: sec:buffer-properties