diff --git a/src/filters/Makefile.am.orig b/src/filters/Makefile.am.orig
deleted file mode 100644
index 4100d44a..00000000
--- a/src/filters/Makefile.am.orig
+++ /dev/null
@@ -1,55 +0,0 @@
-## Process this file with automake to produce Makefile.in
-
-## Copyright (C) 2011 Samediggi
-
-## This program is free software: you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation, either version 3 of the License, or
-## (at your option) any later version.
-
-## This program is distributed in the hope that it will be useful,
-## but WITHOUT ANY WARRANTY; without even the implied warranty of
-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-## GNU General Public License for more details.
-
-## You should have received a copy of the GNU General Public License
-## along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-#########################################################
-############## BEGIN: Local modifications ###############
-
-# List any local filter regex files here:
-GIELLA_FILTER_LOCAL_REGEX_SRCS=\
-					downcase_UCletters.regex\
-					allow_uppercase.regex\
-					remove-bracketed-english-gloss.regex
-
-# List any local filter xfscript files here:
-GIELLA_FILTER_LOCAL_XFSCRIPT_SRCS=
-
-# List any local filter lexc files here:
-GIELLA_FILTER_LOCAL_LEXC_SRCS=
-
-# List any locally generated regex source files here:
-GIELLA_FILTER_LOCAL_GENERATED_REGEX_SRCS=
-
-# List any locally generated xfscript source files here:
-GIELLA_FILTER_LOCAL_GENERATED_XFSCRIPT_SRCS=
-
-# List any locally generated lexc source files here:
-GIELLA_FILTER_LOCAL_GENERATED_LEXC_SRCS=
-
-# List any additional source files here, so that they are included in the dist.
-# Source files that are not directly compiled to fst's but are instead used as
-# part of a local build step should be listed here.
-EXTRA_SRCS=
-
-########## Add local build rules below here: ############
-
-############### END: Local modifications ################
-#########################################################
-
-# Included build file, where the actual build instructions are:
-include $(top_srcdir)/../giella-core/am-shared/src-filters-dir-include.am
-
-# vim: set ft=automake:
diff --git a/src/filters/Makefile.am.rej b/src/filters/Makefile.am.rej
deleted file mode 100644
index 5ef8d2a4..00000000
--- a/src/filters/Makefile.am.rej
+++ /dev/null
@@ -1,15 +0,0 @@
---- src/filters/Makefile.am
-+++ src/filters/Makefile.am
-@@ -20,7 +20,11 @@
- 
- # List any local filter regex files here:
- GIELLA_FILTER_LOCAL_REGEX_SRCS=\
--					downcase_UCletters.regex
-+					downcase_UCletters.regex\
-+					remove-derivation-position-tags.regex \
-+					remove-DNorm-tags.regex \
-+					remove-norm-comp-tags.regex \
-+					rename-POS_before_Der-tags.regex
- 
- # List any local filter xfscript files here:
- GIELLA_FILTER_LOCAL_XFSCRIPT_SRCS=
diff --git a/src/filters/remove-DNorm-tags.regex b/src/filters/remove-DNorm-tags.regex
deleted file mode 100644
index 456f3ed6..00000000
--- a/src/filters/remove-DNorm-tags.regex
+++ /dev/null
@@ -1,18 +0,0 @@
-! Divvun & Giellatekno - open source grammars for Sámi and other languages
-! Copyright © 2000-2010 The University of Tromsø & the Norwegian Sámi Parliament
-! http://giellatekno.uit.no & http://divvun.no
-!
-! This program is free software; you can redistribute and/or modify
-! this file under the terms of the GNU General Public License as published by
-! the Free Software Foundation, either version 3 of the License, or
-! (at your option) any later version. The GNU General Public License
-! is found at http://www.gnu.org/licenses/gpl.html. It is
-! also available in the file $GTHOME/LICENSE.txt.
-!
-! Other licensing options are available upon request, please contact
-! giellatekno@uit.no or feedback@divvun.no
-
-# This filter removes Rel-Foc combinations.
-
-0 <- %+Use%/NotDNorm,
-0 <- %+Use%/DNorm;
diff --git a/src/filters/remove-derivation-position-tags.regex b/src/filters/remove-derivation-position-tags.regex
deleted file mode 100644
index 7f86484e..00000000
--- a/src/filters/remove-derivation-position-tags.regex
+++ /dev/null
@@ -1,10 +0,0 @@
-# This regex removes tags we do not want in the ordinary $(GTLANG).fst
-# That is, we do not give them as output from analysis
-
-# delete the tags governing normative/speller derivation restrictions
-0 <- %+Der,
-0 <- %+Der1,
-0 <- %+Der2,
-0 <- %+Der3,
-0 <- %+Der4,
-0 <- %+Der5;
diff --git a/src/filters/remove-norm-comp-tags.regex b/src/filters/remove-norm-comp-tags.regex
deleted file mode 100644
index 8f83ca91..00000000
--- a/src/filters/remove-norm-comp-tags.regex
+++ /dev/null
@@ -1,23 +0,0 @@
-# This regex removes tags we do not want in the ordinary $(GTLANG).fst
-# That is, we do not give them as output from analysis
-
-# delete normative tags governing compound behaviour
-# -N- in the tag name stands for Normative
-0 <- %+CmpNP%/All,
-0 <- %+CmpNP%/First,
-0 <- %+CmpNP%/Pref,
-0 <- %+CmpNP%/Last,
-0 <- %+CmpNP%/Suff,
-0 <- %+CmpNP%/None,
-0 <- %+CmpNP%/Only,
-0 <- %+CmpN%/SgN,
-0 <- %+CmpN%/SgG,
-0 <- %+CmpN%/PlG,
-0 <- %+CmpN%/SgNomLeft,
-0 <- %+CmpN%/SgGenLeft,
-0 <- %+CmpN%/PlGenLeft,
-0 <- %+CmpN%/Def,
-0 <- %+CmpN%/DefSgNom,
-0 <- %+CmpN%/DefSgGen,
-0 <- %+CmpN%/DefPlGen
-;
diff --git a/src/filters/rename-POS_before_Der-tags.regex b/src/filters/rename-POS_before_Der-tags.regex
deleted file mode 100644
index 9395a0c5..00000000
--- a/src/filters/rename-POS_before_Der-tags.regex
+++ /dev/null
@@ -1,32 +0,0 @@
-# This script renames POS tags when in front of derivations, such that
-# only the final POS tag remains. This allows disambiguation to work
-# properly also for derived words, without having to resort to post-processing
-# hacks. The script is language specific.
-
-# POS tags changes:
-[ "+Ex/Adv"  <- "+Adv" ,
-  "+Ex/N"    <- "+N"   ,
-  "+Ex/A"    <- "+A"   ,
-  "+Ex/Attr" <- "+Attr",
-  "+Ex/V"    <- "+V"   ||
-# change always and only when followed by a derivation:
-  _ \[ "+Cmp" ]*
-       [ "+Der"
-       | "+Der1"
-       | "+Der2"
-       | "+Der3"
-       | "+Der4"
-       | "+Der5"
-       ]
-] .o.
-
-# Transitivity tag changes:
-[ "+Ex/TV" <- "+TV" ,
-  "+Ex/IV" <- "+IV" ||
-# change only within the same stem, and only when followed by
-# a verbal derivation:
-  _ \[ "+Cmp" ]*
-       [ "+TV"
-       | "+IV"
-       ]
-] ;