[doc] rip our section about feature files

Unsupported as of now. They were only ever supported by accident and
very incompletely, which was misleading.

1 files changed, 0 insertions, 32 deletions

diff --git a/doc/luaotfload-main.tex b/doc/luaotfload-main.tex
index c8546ff..c418991 100644
--- a/doc/luaotfload-main.tex
+++ b/doc/luaotfload-main.tex
@@ -584,38 +584,6 @@ obviously, \inlinecode{random}.
          defaulting to \inlinecode{dflt}.
   \endaltitem
 
-  \beginaltitem {featurefile}
-         A comma-separated list of feature files to be applied to the
-         font.
-         %
-         Feature files contain a textual representation of
-         \OpenType tables and extend the features of a font
-         on fly.
-         %
-         After they are applied to a font, features defined in a
-         feature file can be enabled or disabled just like any
-         other font feature.
-         %
-         The syntax is documented in \identifier{Adobe}’s
-         \OpenType Feature File Specification.\footnote{%
-           Cf. \hyperlink {http://www.adobe.com/devnet/opentype/afdko/topic_feature_file_syntax.html}.
-           Feature file support is part of the engine which at the
-           time of this writing (2014) implements the spec only
-           partially.
-           See the
-           \hyperlink [\LUATEX tracker]{http://tracker.luatex.org/view.php?id=231}
-            for details.
-         }
-
-         For a demonstration of how to set a \inlinecode{tkrn} feature consult
-         the file \inlinecode{tkrn.fea} that is part of \identifier{luaotfload}.
-         It can be read and applied as follows:
-
-         \beginlisting
-      \font \test = Latin Modern Roman:featurefile=tkrn.fea;+tkrn
-         \endlisting
-  \endaltitem
-
   \beginaltitem {color}
          A font color, defined as a triplet of two-digit hexadecimal
          \abbrev{rgb} values, with an optional fourth value for