org-contrib: Remove org-eval-light.el and org-evel.el

[Ihor Radchenko <yantar92@posteo.net>]

Hi,

According to https://orgmode.org/worg/org-contrib/#org4b339dd,
org-eval-lite "... is a reworking of Carsten's org-eval with the goals
of a more uniform syntax, safer default execution rules, and increased
ease of execution. Written by Eric Schulte. Link to raw file. This
modules has been superseded by the Org Babel functionality, which is
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
part of the Org core and documented in the manual."

The same for org-eval.

Considering how long Org Babel is a part of Org core, it is probably the
time to remove org-eval-light and org-eval from org-contrib - they are
of no use.

-- 
Ihor Radchenko // yantar92,
Org mode contributor,
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