meta-oe: remove PR = "r0"

* this is default value

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-oe/recipes-core/usleep/usleep_1.0.bb

@@ -3,8 +3,6 @@ SECTION = "base"
 LICENSE = "GPLv2"
 LIC_FILES_CHKSUM = "file://COPYING;md5=751419260aa954499f7abaabaa882bbe"
 
-PR = "r0"
-
 S = "${WORKDIR}"
 DEPENDS = "popt"
 

meta-oe/recipes-devtools/lua/lua_5.3.2.bb

@@ -4,8 +4,6 @@ LICENSE = "MIT"
 LIC_FILES_CHKSUM = "file://doc/readme.html;beginline=318;endline=352;md5=68fc2aa2b751a37ff265524ddf026d7f"
 HOMEPAGE = "http://www.lua.org/"
 
-PR = "r0"
-
 DEPENDS = "readline"
 SRC_URI = "http://www.lua.org/ftp/lua-${PV}.tar.gz;name=tarballsrc \
            file://lua.pc.in \

meta-oe/recipes-extended/haveged/haveged_1.9.1.bb

@@ -12,8 +12,6 @@ SRC_URI = "http://www.issihosts.com/haveged/haveged-${PV}.tar.gz \
 SRC_URI[md5sum] = "015ff58cd10607db0e0de60aeca2f5f8"
 SRC_URI[sha256sum] = "9c2363ed9542a6784ff08e247182137e71f2ddb79e8e6c1ac4ad50d21ced3715"
 
-PR = "r0"
-
 inherit autotools systemd
 
 EXTRA_OECONF = "\

meta-oe/recipes-extended/scsirastools/scsirastools_1.6.4.bb

@@ -7,7 +7,6 @@ DESCRIPTION = "scsirastools were designed to add to the Serviceability of \
 HOMEPAGE = "http://scsirastools.sourceforge.net/"
 LICENSE = "BSD"
 LIC_FILES_CHKSUM = "file://COPYING;md5=687ea108478d26152ae46eb29d9d1545"
-PR = "r0"
 
 SRC_URI = "http://prdownloads.sourceforge.net/scsirastools/scsirastools-${PV}.tar.gz"
 SRC_URI[md5sum] = "2d775111b62e2dfc1960a722f5fda211"

meta-oe/recipes-support/libnih/libnih_1.0.3.bb

@@ -22,8 +22,6 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=751419260aa954499f7abaabaa882bbe"
 DEPENDS = "dbus libnih-native"
 DEPENDS_class-native = "dbus-native"
 
-PR = "r0"
-
 SRC_URI = "https://launchpad.net/${BPN}/1.0/${PV}/+download/${BP}.tar.gz \
     file://libnih_1.0.3-4ubuntu16.patch \
 "