remove support for old linux headers

these can no longer be supported since they are incompatible with
time64.

hashes/linux-2.6.35.tar.xz.sha1

@@ -1 +0,0 @@
-4fc189bd50b734c08985c61bd16cc91cd3fc4e04  linux-2.6.35.tar.xz

hashes/linux-4.4.10.tar.xz.sha1

@@ -1 +0,0 @@
-03b45399a93ae8bc18f1f27ad72f3e98c6bba5c8  linux-4.4.10.tar.xz

hashes/linux-headers-4.4.2-4.tar.xz.sha1

@@ -1 +0,0 @@
-f666310bd3d4dfac3e5a93fe4b756efd8fedca05  linux-headers-4.4.2-4.tar.xz

patches/linux-4.4.10/0001-archscripts.diff

@@ -1,12 +0,0 @@
-diff -u a/Makefile b/Makefile
---- a/Makefile	2016-05-11 10:23:26.000000000 +0100
-+++ b/Makefile	2016-05-20 16:26:20.000000000 +0100
-@@ -1047,7 +1047,7 @@
- archscripts:
- 
- PHONY += __headers
--__headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
-+__headers: $(version_h) scripts_basic asm-generic archheaders FORCE
- 	$(Q)$(MAKE) $(build)=scripts build_unifdef
- 
- PHONY += headers_install_all

patches/linux-4.4.10/0002-absolute-pwd.diff

@@ -1,30 +0,0 @@
-diff -u a/Makefile b/Makefile
---- a/Makefile
-+++ b/Makefile
-@@ -133,7 +133,7 @@ ifneq ($(KBUILD_OUTPUT),)
- # check that the output directory actually exists
- saved-output := $(KBUILD_OUTPUT)
- KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
--								&& /bin/pwd)
-+								&& pwd)
- $(if $(KBUILD_OUTPUT),, \
-      $(error failed to create output directory "$(saved-output)"))
- 
-@@ -924,7 +924,7 @@ ifdef CONFIG_BUILD_DOCSRC
- 	$(Q)$(MAKE) $(build)=Documentation
- endif
- ifdef CONFIG_GDB_SCRIPTS
--	$(Q)ln -fsn `cd $(srctree) && /bin/pwd`/scripts/gdb/vmlinux-gdb.py
-+	$(Q)ln -fsn `cd $(srctree) && pwd`/scripts/gdb/vmlinux-gdb.py
- endif
- 	+$(call if_changed,link-vmlinux)
- 
-@@ -1122,7 +1122,7 @@ _modinst_:
- 	@rm -rf $(MODLIB)/kernel
- 	@rm -f $(MODLIB)/source
- 	@mkdir -p $(MODLIB)/kernel
--	@ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source
-+	@ln -s `cd $(srctree) && pwd` $(MODLIB)/source
- 	@if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
- 		rm -f $(MODLIB)/build ; \
- 		ln -s $(CURDIR) $(MODLIB)/build ; \