Remove node 12: buildpack needs only one version of node

Author: arjun024

manifest.yml

@@ -15,10 +15,6 @@ dependency_deprecation_dates:
   name: dotnet-runtime
   date: 2022-12-04
   link: https://dotnet.microsoft.com/platform/support/policy/dotnet-core
-- version_line: 12.x.x
-  name: node
-  date: 2022-04-01
-  link: https://github.com/nodejs/Release
 - version_line: 14.x.x
   name: node
   date: 2023-04-30
@@ -192,14 +188,6 @@ dependencies:
   - cflinuxfs3
   source: https://github.com/libunwind/libunwind/releases/download/v1.5/libunwind-1.5.0.tar.gz
   source_sha256: 90337653d92d4a13de590781371c604f9031cdb50520366aa1e3a91e1efb1017
-- name: node
-  version: 12.22.1
-  uri: https://buildpacks.cloudfoundry.org/dependencies/node/node_12.22.1_linux_x64_cflinuxfs3_8e413a41.tgz
-  sha256: 8e413a41da4eb2689cd8c5100ed6ab738c4a04ec3943c012ba6a8dec489e5ce1
-  cf_stacks:
-  - cflinuxfs3
-  source: https://nodejs.org/dist/v12.22.1/node-v12.22.1.tar.gz
-  source_sha256: 6023f1f8f03f9780c75e6eca9d372b8411a83757c0389c51baee1c7242afd702
 - name: node
   version: 14.17.0
   uri: https://buildpacks.cloudfoundry.org/dependencies/node/node_14.17.0_linux_x64_cflinuxfs3_2ebd327c.tgz