[librsvg/librsvg-2.50] Remove references to files that have long been removed

[Federico Mena Quintero <federico src gnome org>]

commit 33cc763c98baa6ef53dc35dc642bfbb8a55ba606
Author: Sven Neumann <sven svenfoo org>
Date:   Sat Sep 26 13:14:41 2020 +0200

    Remove references to files that have long been removed

 doc/Makefile.am | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)
---
diff --git a/doc/Makefile.am b/doc/Makefile.am
index 11aca9d0..2da00c96 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -12,7 +12,6 @@ DOC_MODULE = rsvg
 # Uncomment for versioned docs and specify the version of the module, e.g. '2'.
 DOC_MODULE_VERSION = $(RSVG_API_VERSION)
 
-
 # The top-level SGML file. You can change this if you want to.
 DOC_MAIN_SGML_FILE = $(DOC_MODULE)-docs.xml
 
@@ -69,10 +68,7 @@ EXTRA_HFILES =
 # e.g. IGNORE_HFILES=gtkdebug.h gtkintl.h
 IGNORE_HFILES =                        \
        config.h                \
-       rsvg-attributes.h       \
-       rsvg-css.h              \
-       rsvg-private.h          \
-       rsvg-size-callback.h
+       rsvg-css.h
 
 # Images to copy into HTML directory.
 # e.g. HTML_IMAGES=$(top_srcdir)/gtk/stock-icons/stock_about_24.png