recipes: Drop remaining PR values from recipes

* as oe-core did in:
  https://git.openembedded.org/openembedded-core/commit/?id=d4c346e8ab

* when people are have to maintain own PRs for recipes in oe-core, they
  might add them for meta-oe recipes at the same time when upgrading
  to next LTS

Signed-off-by: Martin Jansa <martin.jansa@gmail.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-core/dbus/dbus-daemon-proxy_git.bb

@@ -4,7 +4,6 @@ LIC_FILES_CHKSUM = "file://dbus-daemon-proxy.c;endline=19;md5=41df6d21fe1c97d6a1
 DEPENDS = "dbus dbus-glib"
 SRCREV = "1226a0a1374628ff191f6d8a56000be5e53e7608"
 PV = "0.0.0+git"
-PR = "r1.59"
 
 SRC_URI = "git://github.com/alban/dbus-daemon-proxy;branch=master;protocol=https \
            file://0001-dbus-daemon-proxy-Return-DBUS_HANDLER_RESULT_NOT_YET.patch \

meta-oe/recipes-core/meta/distro-feed-configs.bb

@@ -1,5 +1,4 @@
 SUMMARY = "Configuration files for online package repositories aka feeds"
-PR = "r6"
 LICENSE = "MIT"
 LIC_FILES_CHKSUM = "file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420"
 

meta-oe/recipes-core/packagegroups/packagegroup-basic.bb

@@ -3,7 +3,6 @@
 
 SUMMARY = "Basic task to get a device online"
 
-PR = "r13"
 
 PACKAGE_ARCH = "${MACHINE_ARCH}"
 inherit packagegroup

meta-oe/recipes-core/packagegroups/packagegroup-boot.bb

@@ -1,6 +1,5 @@
 SUMMARY = "Basic task to get a device booting"
 
-PR = "r58"
 
 PACKAGE_ARCH = "${MACHINE_ARCH}"
 inherit packagegroup

meta-oe/recipes-core/proxy-libintl/proxy-libintl_20100902.bb

@@ -4,7 +4,6 @@ SECTION = "libs"
 LICENSE = "LGPL-2.0-only"
 LIC_FILES_CHKSUM = "file://src/proxy-libintl/COPYING.LIB.txt;md5=bc400bc21422f9a92e76ec2c5167ca2e"
 
-PR = "r1"
 PROVIDES = "virtual/libintl"
 
 SRC_URI = " \