Removed serde_derive dependency

[jorgecarleitao]

Moved file around, which allowed to remove the dependency that is only used for testing.

[codecov]

Codecov Report

Merging #279 (818cd46) into main (c7e1a4d) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #279   +/-   ##
=======================================
  Coverage   77.15%   77.15%           
=======================================
  Files         254      254           
  Lines       20649    20649           
=======================================
  Hits        15931    15931           
  Misses       4718     4718           

Impacted Files	Coverage Δ
src/io/json/mod.rs	100.00% <ø> (ø)
src/io/json_integration/mod.rs	0.00% <ø> (ø)
src/io/json_integration/schema.rs	42.12% <ø> (ø)

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