python-pip is not needed for a running ros system

meta/recipes-core/images/core-image-bmw.bb

@@ -13,4 +13,4 @@ IMAGE_ROOTFS_EXTRA_SPACE = "5242880"
 # remove not needed ipkg informations
 ROOTFS_POSTPROCESS_COMMAND += "remove_packaging_data_files ; "
 
-IMAGE_INSTALL += "boost packagegroup-core-ssh-openssh dhcp-client python-setuptools python-pip python-modules python-rospkg python-pyyaml"
+IMAGE_INSTALL += "boost packagegroup-core-ssh-openssh dhcp-client python-setuptools python-modules python-rospkg python-pyyaml"

meta/recipes-devtools/python/python-pyyaml_3.10.bb

+DESCRIPTION = "YAML parser and emitter for Python"
+SECTION = "devel/python"
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://LICENSE;md5=6015f088759b10e0bc2bf64898d4ae17"
+
+SRCNAME = "PyYAML"
+
+SRC_URI = "http://pyyaml.org/download/pyyaml/PyYAML-3.10.tar.gz"
+SRC_URI[md5sum] = "74c94a383886519e9e7b3dd1ee540247"
+SRC_URI[sha256sum] = "e713da45c96ca53a3a8b48140d4120374db622df16ab71759c9ceb5b8d46fe7c"
+
+S = "${WORKDIR}/${SRCNAME}-${PV}"
+
+inherit distutils

meta/recipes-devtools/python/python-rospkg_1.0.15.bb

+DESCRIPTION = "ROS package library"
+SECTION = "devel/python"
+LICENSE = "BSD"
+LIC_FILES_CHKSUM = "file://PKG-INFO;md5=083869c8da6fdf8c3a5bbd7d1bf93cac"
+SRCNAME = "rospkg"
+
+SRC_URI = "http://pypi.python.org/packages/source/r/rospkg/rospkg-1.0.15.tar.gz"
+SRC_URI[md5sum] = "3c9b1b8d1e90950944b3f10bad16ecff"
+SRC_URI[sha256sum] = "f8be5a9d74f7e656d38b2c3b44b7e367fce4001d613ca3fbfcbb87c4937956f2"
+
+S = "${WORKDIR}/${SRCNAME}-${PV}"
+
+inherit distutils
+