Remove cflinuxfs2 dependencies

Co-authored-by: Guillermo Kardolus <gkardolus@pivotal.io>

Author: ndon55555

buildpack.toml.tmpl

@@ -17,7 +17,7 @@ name = "Yarn"
 sha256 = "e3835194409f1b3afa1c62ca82f561f1c29d26580c9e220c36866317e043c6f3"
 source = "https://github.com/yarnpkg/yarn/releases/download/v1.17.3/yarn-v1.17.3.tar.gz"
 source_sha256 = "e3835194409f1b3afa1c62ca82f561f1c29d26580c9e220c36866317e043c6f3"
-stacks = ["org.cloudfoundry.stacks.cflinuxfs2","org.cloudfoundry.stacks.cflinuxfs3","io.buildpacks.stacks.bionic"]
+stacks = ["org.cloudfoundry.stacks.cflinuxfs3","io.buildpacks.stacks.bionic"]
 uri = "https://buildpacks.cloudfoundry.org/dependencies/yarn/yarn-1.17.3-any-stack-e3835194.tar.gz"
 version = "1.17.3"