recipes: Delete superfluous assignments, S = ${WORKDIR}/${BP}

Given that bitbake.conf sets the default values:

BP = "${BPN}-${PV}"
S = "${WORKDIR}/${BP}"

there are a number of recipes that set the variable S completely
superfluously, so get rid of them.

(From OE-Core rev: ebe8578df3f162045086cd60a129eb7ac3eacf4c)

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/dpkg/dpkg.inc

@@ -9,8 +9,6 @@ DEPENDS_class-native = "bzip2-replacement-native zlib-native virtual/update-alte
 RDEPENDS_${PN} = "${VIRTUAL-RUNTIME_update-alternatives} xz run-postinsts perl"
 RDEPENDS_${PN}_class-native = "xz-native"
 
-S = "${WORKDIR}/${BPN}-${PV}"
-
 inherit autotools gettext perlnative pkgconfig systemd
 
 python () {

meta/recipes-devtools/gdb/gdb-7.8.1.inc

@@ -4,8 +4,6 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=59530bdf33659b29e73d4adb9f9f6552 \
 		    file://COPYING3.LIB;md5=6a6a8e020838b23406c81b19c1d46df6 \
 		    file://COPYING.LIB;md5=9f604d8a4f8e74f4f5140845a21b6674"
 
-S = "${WORKDIR}/${BPN}-${PV}"
-
 SRC_URI[md5sum] = "997492cc3475c96f35ecc8775248c9b1"
 SRC_URI[sha256sum] = "d7a923d876ecfa1cec4c1c79c014c9d8e58783a25855a95cf260275f61990647"
 

meta/recipes-devtools/kconfig-frontends/kconfig-frontends_3.12.0.0.bb

@@ -18,8 +18,6 @@ SRC_URI = "http://ymorin.is-a-geek.org/download/${BPN}/${BP}.tar.xz"
 SRC_URI[md5sum] = "b939280dcc83f8feabd87a1d5f9b00c2"
 SRC_URI[sha256sum] = "ea2615a62c74bea6ce3b38402f00c7513858f307f6ba7aa9fdbf0bbc12bcf407"
 
-S = "${WORKDIR}/${BPN}-${PV}"
-
 inherit autotools
 do_configure_prepend () {
 	mkdir -p scripts/.autostuff/m4

meta/recipes-devtools/opkg/opkg_0.2.4.bb

@@ -19,8 +19,6 @@ SRC_URI = "http://downloads.yoctoproject.org/releases/${BPN}/${BPN}-${PV}.tar.gz
            file://0001-opkg-key-Backport-improvements.patch \
 "
 
-S = "${WORKDIR}/${BPN}-${PV}"
-
 SRC_URI[md5sum] = "40ed2aee15abc8d550539449630091bd"
 SRC_URI[sha256sum] = "0f40c7e457d81edf9aedc07c778f4697111ab163a38ef95999faece015453086"