Remove unused 'pdftk' component

It is broken since commit 71ed0078
("pdftk removed from erp5").

component/pdftk/buildout.cfg

-[buildout]
-# Note: Locally provided gcc with gcj is used, as there is high unstability
-# in how gcj is functional on many operating systems.
-# Because of this the only way to have portable pdftk profile it is required
-# to provide working gcj and then have it used for pdftk compilation.
-extends =
-  ../fastjar/buildout.cfg
-  ../gcc/buildout.cfg
-
-parts = pdftk
-
-[pdftk-1.44-Makefile.Base.patch]
-recipe = hexagonit.recipe.download
-ignore-existing = true
-url = ${:_profile_base_location_}/${:filename}
-download-only = true
-md5sum = 04a3607213e4e638c1fd993321804499
-filename = pdftk-1.44-Makefile.Base.patch
-
-[pdftk-hooks-download]
-recipe = hexagonit.recipe.download
-ignore-existing = true
-url = ${:_profile_base_location_}/${:filename}
-filename = pdftk-hooks.py
-md5sum = d2a067b98953ad30ba1230f87dfb8b92
-download-only = true
-
-[pdftk]
-recipe = slapos.recipe.cmmi
-url = http://www.pdflabs.com/tools/pdftk-the-pdf-toolkit/pdftk-1.44-src.zip
-md5sum = 9eb50fffcd621a627d387750c60982b4
-configure-command = true
-patches =
-  ${pdftk-1.44-Makefile.Base.patch:location}/${pdftk-1.44-Makefile.Base.patch:filename}
-patch-options = -p1
-# pdftk does not work correcly with parallel building
-make-options =
-  -j1
-  -f Makefile.Redhat
-  DEST=${buildout:parts-directory}/${:_buildout_section_name_}
-
-pre-make-hook = ${pdftk-hooks-download:location}/${pdftk-hooks-download:filename}:pre_make_hook
-environment =
-  PATH=${gcc-java-minimal:location}/bin:${fastjar:location}/bin:%(PATH)s
-  LDFLAGS=-L${gcc-java-minimal:location}/lib -Wl,-rpath=${gcc-java-minimal:location}/lib -L${gcc-java-minimal:location}/lib64 -Wl,-rpath=${gcc-java-minimal:location}/lib64
-  LD_LIBRARY_PATH=${gcc-java-minimal:location}/lib:${gcc-java-minimal:location}/lib64

component/pdftk/pdftk-1.44-Makefile.Base.patch

-diff --git a/pdftk/Makefile.Base b/pdftk/Makefile.Base
-index 0bedd04..36a439e 100644
---- a/pdftk/Makefile.Base
-+++ b/pdftk/Makefile.Base
-@@ -35,22 +35,24 @@ javalib :
- 	$(MAKE) -f Makefile -iC $(JAVALIBPATH) all
- 
- attachments.o : attachments.cc attachments.h pdftk.h $(JAVALIB)
--	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -I$(JAVALIBPATH) attachments.cc -c
-+	$(CXX) $(CPPFLAGS) $(LDFLAGS) $(CXXFLAGS) -I$(JAVALIBPATH) attachments.cc -c
- 
- report.o : report.cc report.h pdftk.h $(JAVALIB)
--	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -I$(JAVALIBPATH) report.cc -c
-+	$(CXX) $(CPPFLAGS) $(LDFLAGS) $(CXXFLAGS) -I$(JAVALIBPATH) report.cc -c
- 
- pdftk.o : pdftk.cc pdftk.h attachments.h report.h $(JAVALIB) $(GCJ_LOCAL_LIB_FULL)
--	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -I$(JAVALIBPATH) pdftk.cc -c
-+	$(CXX) $(CPPFLAGS) $(LDFLAGS) $(CXXFLAGS) -I$(JAVALIBPATH) pdftk.cc -c
- 
- pdftk : pdftk.o attachments.o report.o $(JAVALIB) $(GCJ_LOCAL_LIB_FULL)
--	$(CXX) $(CXXFLAGS) attachments.o report.o pdftk.o $(JAVALIB) $(GCJ_LOCAL_LIB_FULL) $(LDLIBS) -o pdftk
-+	$(CXX) $(CXXFLAGS) $(LDFLAGS) attachments.o report.o pdftk.o $(JAVALIB) $(GCJ_LOCAL_LIB_FULL) $(LDLIBS) -o pdftk
- 
- install:
--	/usr/bin/install pdftk /usr/local/bin 
-+	mkdir -p ${DEST}/bin
-+	install pdftk ${DEST}/bin
- 
- uninstall:
--	$(RM) $(RMFLAGS) /usr/local/bin/pdftk
-+	$(RM) $(RMFLAGS) ${DEST}/pdftk
-+	rmdir ${DEST}
- 
- clean:
- 	$(RM) $(RMFLAGS) *.o

component/pdftk/pdftk-hooks.py

-import os
-def pre_make_hook(options, buildout):
-  # change to pdftk directory, where built process shall be done
-  os.chdir('pdftk')