Fix: Remove unused accessor, constructor parameter, and field

[localheinz]

This PR

• removes an unused accessor, constructor parameter, and field from EntityDef

Follows #1.

[codecov]

Codecov Report

Merging #52 into master will increase coverage by 0.92%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master      #52      +/-   ##
============================================
+ Coverage     92.89%   93.81%   +0.92%     
+ Complexity       81       80       -1     
============================================
  Files             8        8              
  Lines           197      194       -3     
============================================
- Hits            183      182       -1     
+ Misses           14       12       -2

Impacted Files	Coverage Δ	Complexity Δ
src/FixtureFactory.php	91.66% <ø> (ø)	37 <0> (ø)	⬇️
src/EntityDef.php	95.12% <100%> (+4.21%)	17 <1> (-1)	⬇️

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