FIX : motion.json typo fix and remove unused fields

[sjeung]

• Updated ´motion.json´ field MISChannelCount to MISCChannelCount
• Bring fields up-to-date with spec change, removing SpatialAxes, RotationOrder, RotationRule
• Remove unused field TrackingSystemCount

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -2.29% ⚠️

Comparison is base (6677c9a) 85.68% compared to head (a918db2) 83.40%.

❗ Current head a918db2 differs from pull request most recent head abde27b. Consider uploading reports for the commit abde27b to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1791      +/-   ##
==========================================
- Coverage   85.68%   83.40%   -2.29%     
==========================================
  Files         130       92      -38     
  Lines        6582     3893    -2689     
  Branches     1525     1270     -255     
==========================================
- Hits         5640     3247    -2393     
+ Misses        836      548     -288     
+ Partials      106       98       -8     

see 38 files with indirect coverage changes

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