chore: remove two contrib/ ignore no more used, #6252

Author: fdefelici

.gitignore

@@ -46,8 +46,6 @@ secrets*
 
 # will have compiled files and executables
 target/
-contrib/tools/puppet-chain/target/
-contrib/core-contract-tests/.cache/
 contrib/tools/config-docs-generator/target/
 
 # These are backup files generated by rustfmt