fix(catalyst): Use new COREOS_SDK_VERSION var from version.txt
fix(catalyst): Use new COREOS_SDK_VERSION var from version.txt

The current SDK version is now provided by the manifest's version.txt
file which is already sourced by common.sh.

coreos/scripts,mischief/scripts,bcwaldon/coreos-scripts,bcwaldon/coreos-scripts,BugRoger/scripts,mischief/scripts,andrejro/coreos--scripts,zhang0137/scripts,nicescale/scripts,smilart/scripts,bcwaldon/coreos-scripts,nicescale/scripts,marineam/coreos-scripts,mjg59/scripts,coreos/scripts,mjg59/scripts,glevand/coreos--scripts,andrejro/coreos--scripts,zhang0137/scripts,vmware/coreos-scripts,marineam/coreos-scripts,fivethreeo/scripts,sigma/coreos-scripts,crawford/scripts,mjg59/scripts,gtank/scripts,smilart/scripts,sigma/coreos-scripts,nicescale/scripts,vmware/coreos-scripts,endocode/scripts,BugRoger/scripts,glevand/coreos--scripts,marineam/coreos-scripts,mischief/scripts,smilart/scripts,zhang0137/scripts,endocode/scripts,crawford/scripts,gtank/scripts,sigma/coreos-scripts,trnubo/scripts,trnubo/scripts,BugRoger/scripts,vmware/coreos-scripts,endocode/scripts,fivethreeo/scripts,gtank/scripts,trnubo/scripts,crawford/scripts,andrejro/coreos--scripts,fivethreeo/scripts