cubicweb #2742462 drop typed_eid in favour of int [validation pending]

typed_eid was introduced to abstract the eid type when running on Google AppEngine. It is not used anymore and can be removed.

prioritynormal
typeenhancement
done in3.17.0
load0.100
load left0.000
closed by#f5027f8d2478 drop typed_eid() in favour of int() (closes #2742462)
patchdrop typed_eid() in favour of int() (closes #2742462) [applied]