diff --git a/examples/PLEAC Codebooks.external b/examples/PLEAC Codebooks.external
deleted file mode 100644
index d766038a4..000000000
--- a/examples/PLEAC Codebooks.external	
+++ /dev/null
@@ -1,59 +0,0 @@
-PHP Strings,http://pleac.sourceforge.net/pleac_php/strings.html
-PHP Numbers,http://pleac.sourceforge.net/pleac_php/numbers.html
-PHP Date/Time,http://pleac.sourceforge.net/pleac_php/datesandtimes.html
-PHP Arrays,http://pleac.sourceforge.net/pleac_php/arrays.html
-PHP Hashes,http://pleac.sourceforge.net/pleac_php/hashes.html
-PHP Filesystem,http://pleac.sourceforge.net/pleac_php/directories.html
-PHP Functions,http://pleac.sourceforge.net/pleac_php/subroutines.html
-PHP IPC,http://pleac.sourceforge.net/pleac_php/processmanagementetc.html
-Perl Strings,http://pleac.sourceforge.net/pleac_perl/strings.html
-Perl Numbers,http://pleac.sourceforge.net/pleac_perl/numbers.html
-Perl Date/Time,http://pleac.sourceforge.net/pleac_perl/datesandtimes.html
-Perl Arrays,http://pleac.sourceforge.net/pleac_perl/arrays.html
-Perl Hashes,http://pleac.sourceforge.net/pleac_perl/hashes.html
-Perl Matching,http://pleac.sourceforge.net/pleac_perl/patternmatching.html
-Perl File Access,http://pleac.sourceforge.net/pleac_perl/fileaccess.html
-Perl File Content,http://pleac.sourceforge.net/pleac_perl/filecontents.html
-Perl Directories,http://pleac.sourceforge.net/pleac_perl/directories.html
-Perl Functions,http://pleac.sourceforge.net/pleac_perl/subroutines.html
-Perl References,http://pleac.sourceforge.net/pleac_perl/referencesandrecords.html
-Perl Modules,http://pleac.sourceforge.net/pleac_perl/packagesetc.html
-Perl Classes,http://pleac.sourceforge.net/pleac_perl/classesetc.html
-Perl IPC,http://pleac.sourceforge.net/pleac_perl/processmanagementetc.html
-Perl Sockets,http://pleac.sourceforge.net/pleac_perl/sockets.html
-Perl Internet,http://pleac.sourceforge.net/pleac_perl/internetservices.html
-Perl CGI,http://pleac.sourceforge.net/pleac_perl/cgiprogramming.html
-Python Strings,http://pleac.sourceforge.net/pleac_python/strings.html
-Python Numbers,http://pleac.sourceforge.net/pleac_python/numbers.html
-Python Date/Time,http://pleac.sourceforge.net/pleac_python/datesandtimes.html
-Python Arrays,http://pleac.sourceforge.net/pleac_python/arrays.html
-Python Hashes,http://pleac.sourceforge.net/pleac_python/hashes.html
-Python Matching,http://pleac.sourceforge.net/pleac_python/patternmatching.html
-Python File Access,http://pleac.sourceforge.net/pleac_python/fileaccess.html
-Python File Content,http://pleac.sourceforge.net/pleac_python/filecontents.html
-Python Directories,http://pleac.sourceforge.net/pleac_python/directories.html
-Python Functions,http://pleac.sourceforge.net/pleac_python/subroutines.html
-Python References,http://pleac.sourceforge.net/pleac_python/referencesandrecords.html
-Python Modules,http://pleac.sourceforge.net/pleac_python/packagesetc.html
-Python Classes,http://pleac.sourceforge.net/pleac_python/classesetc.html
-Python IPC,http://pleac.sourceforge.net/pleac_python/processmanagementetc.html
-Python Sockets,http://pleac.sourceforge.net/pleac_python/sockets.html
-Python Internet,http://pleac.sourceforge.net/pleac_python/internetservices.html
-Python CGI,http://pleac.sourceforge.net/pleac_python/cgiprogramming.html
-Ruby Strings,http://pleac.sourceforge.net/pleac_ruby/strings.html
-Ruby Numbers,http://pleac.sourceforge.net/pleac_ruby/numbers.html
-Ruby Date/Time,http://pleac.sourceforge.net/pleac_ruby/datesandtimes.html
-Ruby Arrays,http://pleac.sourceforge.net/pleac_ruby/arrays.html
-Ruby Hashes,http://pleac.sourceforge.net/pleac_ruby/hashes.html
-Ruby Matching,http://pleac.sourceforge.net/pleac_ruby/patternmatching.html
-Ruby File Access,http://pleac.sourceforge.net/pleac_ruby/fileaccess.html
-Ruby File Content,http://pleac.sourceforge.net/pleac_ruby/filecontents.html
-Ruby Directories,http://pleac.sourceforge.net/pleac_ruby/directories.html
-Ruby Functions,http://pleac.sourceforge.net/pleac_ruby/subroutines.html
-Ruby References,http://pleac.sourceforge.net/pleac_ruby/referencesandrecords.html
-Ruby Modules,http://pleac.sourceforge.net/pleac_ruby/packagesetc.html
-Ruby Classes,http://pleac.sourceforge.net/pleac_ruby/classesetc.html
-Ruby IPC,http://pleac.sourceforge.net/pleac_ruby/processmanagementetc.html
-Ruby Sockets,http://pleac.sourceforge.net/pleac_ruby/sockets.html
-Ruby Internet,http://pleac.sourceforge.net/pleac_ruby/internetservices.html
-Ruby CGI,http://pleac.sourceforge.net/pleac_ruby/cgiprogramming.html