Revert "Pass --host to configure when cross-building"

This reverts commit 9802a27.

No support in Ubuntu 16.04

Author: sorah

debian/control

@@ -19,7 +19,6 @@ Build-Depends: bison,
                netbase,
                openssl,
                procps,
-               ruby:native <cross>,
                rubygems-integration (>= 1.6),
                systemtap-sdt-dev [linux-any],
                zlib1g-dev

debian/rules

@@ -10,9 +10,7 @@ export DH_OPTIONS
 TESTOPTS += -v
 export TESTOPTS
 
-DEB_BUILD_GNU_TYPE ?= $(shell dpkg-architecture -qDEB_BUILD_GNU_TYPE)
 DEB_HOST_ARCH ?= $(shell dpkg-architecture -qDEB_HOST_ARCH)
-DEB_HOST_GNU_TYPE ?= $(shell dpkg-architecture -qDEB_HOST_GNU_TYPE)
 DEB_HOST_MULTIARCH ?= $(shell dpkg-architecture -qDEB_HOST_MULTIARCH)
 
 include /usr/share/dpkg/pkg-info.mk
@@ -31,17 +29,6 @@ configure_options += --disable-rpath
 configure_options += --with-sitedir='/usr/local/lib/site_ruby'
 configure_options += --with-sitearchdir="/usr/local/lib/$(DEB_HOST_MULTIARCH)/site_ruby"
 
-ifneq ($(DEB_BUILD_GNU_TYPE), $(DEB_HOST_GNU_TYPE))
-# Cross-building. This is the same logic that debhelper's
-# lib/Debian/Debhelper/Buildsystem/autoconf.pm uses.
-# note that you also need --with-baseruby, so use the "cross" build-profile.
-configure_options += --build=$(DEB_BUILD_GNU_TYPE)
-configure_options += --host=$(DEB_HOST_GNU_TYPE)
-endif
-ifneq ($(filter cross,$(DEB_BUILD_PROFILES)),)
-configure_options += --with-baseruby=/usr/bin/ruby
-endif
-
 # the following are ignored by ./configure, but used by some extconf.rb scripts
 configure_options += --enable-ipv6
 configure_options += --with-dbm-type=gdbm_compat