bin/distro-install* are called from Makefile so the env is already there

Change-Id: I11242a896297f71ce0977c5ffeadf5f64f61455e

bin/distro-install-clean-up

 #!/bin/sh
 
 if test -z "${SRC_ROOT}"; then
-    source ./config_host.mk.source
-fi
-if test -z "${SOLARENV}"; then
     echo "distro-install-clean-up: No environment set!"
     exit 1
 fi

bin/distro-install-desktop-integration

 #!/bin/sh
 
 if test -z "${SRC_ROOT}"; then
-    source ./config_host.mk.source
-fi
-if test -z "${SOLARENV}"; then
     echo "distro-install-clean-up: No environment set!"
     exit 1
 fi

bin/distro-install-file-lists

 #!/bin/sh
 
 if test -z "${SRC_ROOT}"; then
-    source ./config_host.mk.source
-fi
-if test -z "${SOLARENV}"; then
     echo "distro-install-clean-up: No environment set!"
     exit 1
 fi

bin/distro-install-sdk

 #!/bin/sh
 
 if test -z "${SRC_ROOT}"; then
-    source ./config_host.mk.source
-fi
-if test -z "${SOLARENV}"; then
     echo "distro-install-clean-up: No environment set!"
     exit 1
 fi