Remove old JavaScript modules versions

[codebien]

• Define a policy for the definition of old (e.g. not expected to be maintained). Last 4 versions.

• Update the release process documentation including the defined policy.

• Remove the old JavaScript modules' versions.

[ppcano]

Will start with a limit of the latest 4 versions. But we'll change the value of MAX_JS_API_VERSIONS_TO_BUILD depending on final decision.

Remove the old JavaScript modules' versions.

To start, we can do this manually.

Update the release process documentation including the defined policy.

This guide is for creating a new version. We can wait for updating it until we have decided the removal process.

[ppcano]

@olegbespalov, reopened.