Remove angr-targets from repo list (#53)

Author: twizmwazin

ci-image/conf/repo-list.txt

@@ -14,7 +14,6 @@ angr/angr -> archinfo, pyvex, claripy, cle, ailment, pysoot
 # docs and add-ons
 !angr/angr-examples -> angr
 angr/angr-platforms:angr_platforms -> angr
-angr/angr-targets:angr_targets
 angr/pysoot
 angr/archr