Updated comments to represent the version change.
Updates samples that were missing required class files.
Removes obsolete sample file.
Updates default API version from 98.0 to 109.0
Removes duplicate sandbox variable processing

Removes duplicate sandbox variable processing since it will lead
to issues if the user sets the sandbox variable to an empty string
on a live environment. The sandbox will be always set to true if
an empty string is supplied in the config file as sandbox var.