Remove wrong Ricoh GR II alias (GR Digital 2 is a different camera)

[markotoplak]

As suggested in #309 by @kmilos - and I agree.

[codecov[bot]]

Codecov Report

Merging #310 (5999037) into develop (3afc5b1) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #310   +/-   ##
========================================
  Coverage    60.03%   60.03%           
========================================
  Files          235      235           
  Lines        12715    12715           
  Branches      1757     1757           
========================================
  Hits          7634     7634           
  Misses        4952     4952           
  Partials       129      129           

Flag	Coverage Δ
integration	47.70% <ø> (ø)
rpu_u	47.70% <ø> (ø)
unittests	22.74% <ø> (ø)

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