[cleanup] Remove leftover (?) file Doxydep

(cherry picked from commit 691ac90c)
Signed-off-by: Steffen Müthing <muething@dune-project.org>

doc/doxygen/Doxydep

-#!/usr/bin/perl -w
-
-use strict;
-use English;
-use IO::Handle;
-
-# OPTIONS
-my $defaulttarget = "doxygen-tag";
-my $USAGE = "Doxydep <DOXYFILE> <DEPFILE> [TARGET]".
-    "\tDOXYFILE: Configuration file for Doxygen\n".
-    "\tDEPFILE: Outfile for the dependencies\n".
-    "\tTARGT: Target for the Makefile (default=$defaulttarget)";
-my $doxyname = shift || die $USAGE;
-my $depfile = shift || die $USAGE;
-my $target;
-$target = shift;
-if (! $target) { $target = $defaulttarget };
-
-# write an entry for DEPFILE
-sub addDep ($) {
-	my $dep = shift;
-	if (defined($dep) && ! $dep eq "") {
-		print DEPFILE "$target: $dep\n\n";
-		print DEPFILE "$dep:\n\n";
-	}
-}
-
-# get all files in a directory, except . and ..
-sub readDir ($) {
-    my $dir = shift;
-	$dir =~ s/\/$//;
-	$dir = $dir."/";
-
-	my @entries;
-    opendir DIR, $dir;
-	while (my $f = readdir DIR) { 
-		if ($f !~ /^\.\.?$/) {
-			push (@entries, $dir.$f);
-		}
-	}
-	close DIR;
-
-	return @entries;
-}
-
-# find file matching the pattern
-sub findFiles ($$$) {
-    my $dir = shift;
-	my $pattern = shift;
-	my $recursive  = shift;
-
-	$pattern =~ s/\*/\\w*/g;
-	$pattern =~ s/\?/\\w/g;
-
-	my @entries;
-	push (@entries, readDir($dir));
-
-    my @existing;
-    while (my $file = pop(@entries)) {
-		if (( -d $file ) && ( $recursive eq "YES" )) {
-			push (@entries, readDir($file));
-		}
-		next unless -f $file;
-		next if ($file !~ /[\/^]$pattern$/);
-		if (( -f $file ) && ( -r $file )) {
-			push @existing, $file;
-		} else {
-			# warnen (nur nicht bei . und ..)
-			print "Warnung: ignoriere $file!\n";
-		}
-    }
-
-    return @existing;
-};
-
-# read all options from the Doxyfile into a hash
-sub parseDoxyfile ($)
-{
-	my $doxyname = shift;
-	my %doxyfile = ();
-	open DOXYFILE, $doxyname || die "Could not open $doxyname\n";
-
-	while (<DOXYFILE>) {
-		chomp;
-		next if (/^\s*\#/);
-		my $input =$_;
-		my $tag;
-		if ($input=~/^\s*(\S+)\s*=/) {	
-			$tag = $1;
-			$doxyfile{$tag} = "";
-			while ($input=~/\\\s*$/) {
-				$input =~ s/\\\s*$//;
-				$doxyfile{$tag} = $doxyfile{$tag}.$input;
-				$input = DOXYFILE->getline();
-			};
-			$input =~ s/\\\s*$//;
-			$doxyfile{$tag} = $doxyfile{$tag}.$input;
-			$doxyfile{$tag} =~ s/\s+/ /g;
-			$doxyfile{$tag} =~ s/^\s*$tag\s*=\s*//;
-		}
-	}
-	close DOXYFILE;
-	return %doxyfile;
-}
-
-# WRITE DEPFILE
-my %doxyfile = parseDoxyfile($doxyname);
-open DEPFILE, ">$depfile" || die "Could not open $depfile\n";
-# foreach input defined in INPUT = ...
-foreach my $input (split(/ /, $doxyfile{"INPUT"})) {
-	next if (! defined($input));
-	next if ( $input eq "" );
-	if ( -f $input ) {
-		addDep($input);
-	}
-	else {
-        # foreach pattern defined in FILE_PATTERNS = ...
-		foreach my $pattern (split(/ /, $doxyfile{"FILE_PATTERNS"})) {
-			next if (! defined($pattern));
-			next if ( $pattern eq "" );
-			my @files = findFiles($input, $pattern, $doxyfile{"RECURSIVE"});
-			foreach my $f (@files) {
-				addDep($f);
-			}
-		}
-	}
-}
-addDep($doxyfile{"HTML_HEADER"});
-addDep($doxyfile{"HTML_FOOTER"});
-addDep($doxyfile{"LATEX_HEADER"});
-close DEPFILE;