Remove default false from json schema

[mirpedrol]

Since v2.9 defaults to false were introduced in the nextflow schema. They are not required, as any value not evaluating to true won't be printed by printSummaryParams(). Those defaults are also automatically removed by nf-core schema build.

PR checklist

• This comment contains a description of changes (with reason)
• CHANGELOG.md is updated
• If you've fixed a bug or added code that should be tested, add tests!
• Documentation in docs is updated

[codecov]

Codecov Report

Merging #2376 (1f3f0de) into dev (7e69eed) will increase coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##              dev    #2376      +/-   ##
==========================================
+ Coverage   72.81%   72.85%   +0.03%     
==========================================
  Files          78       78              
  Lines        8888     8888              
==========================================
+ Hits         6472     6475       +3     
+ Misses       2416     2413       -3     

see 3 files with indirect coverage changes