Revert "Add metadata_json_deps + rake task"

[bastelfreak]

This reverts commit 86db8fa.

The gettext-setup gem causes some ugly errors on our side:

• Remove unused gettext-setup dependency puppetlabs/forge-ruby#91
• modulesync 5.0.0 puppet-mosquitto#18
• https://tickets.puppetlabs.com/browse/MODULES-6598

[codecov]

Codecov Report

Merging #54 (35b707b) into master (ed10815) will increase coverage by 2.57%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #54      +/-   ##
==========================================
+ Coverage   25.75%   28.33%   +2.57%     
==========================================
  Files           2        2              
  Lines          66       60       -6     
==========================================
  Hits           17       17              
+ Misses         49       43       -6     

Impacted Files	Coverage Δ
lib/voxpupuli/test/rake.rb	0.00% <ø> (ø)

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[bastelfreak]

for the record: I still think that this is really helpful in our modules, but with the broken gettext-setup implementation it's not always useable. Instead of figuring out when it breaks and when not it's best to revert it for now.

[root-expert]

LGTM

[ekohl]

👍 for removal. We have it in our modulesync_config (https://github.com/voxpupuli/modulesync_config/blob/4dfcd16dad09d82fc9bf32858ed6b59529d40044/Rakefile#L3-L7) which can run in bulk. That is also more efficient since you can cache the module versions on the forge which helps a lot (no need to check for stdlib about a 100 times).