Eliminate second constructor for ECCO_metadata

[glwagner]

Closes #226

[navidcy]

Test break tho..

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 0.00%. Comparing base (ce5b559) to head (e64e074).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/DataWrangling/ECCO/ECCO_restoring.jl	0.00%	1 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #241   +/-   ##
=====================================
  Coverage   0.00%   0.00%           
=====================================
  Files         32      32           
  Lines       1841    1840    -1     
=====================================
+ Misses      1841    1840    -1     

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