Fix: Remove unnecessary constructor parameter and field

[localheinz]

This PR

• removes an unnecessary constructor parameter and field from EntityDef

Follows #1.

[codecov]

Codecov Report

Merging #56 into master will decrease coverage by 0.03%.
The diff coverage is 100%.

@@             Coverage Diff             @@
##             master     #56      +/-   ##
===========================================
- Coverage     93.53%   93.5%   -0.04%     
  Complexity       80      80              
===========================================
  Files             8       8              
  Lines           201     200       -1     
===========================================
- Hits            188     187       -1     
  Misses           13      13

Impacted Files	Coverage Δ	Complexity Δ
src/FixtureFactory.php	91.11% <ø> (ø)	37 <0> (ø)	⬇️
src/EntityDef.php	95.12% <100%> (-0.12%)	17 <1> (ø)

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