Revert "Replace Transformer Factory with The Secured Transformer Factory"

[Avishka-Shamendra]

Purpose

Reverts #177 as this requires a SAXON bump which we are unable to do at this moment

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 50.76%. Comparing base (cb41ff1) to head (fd8aad5).
Report is 4 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #178   +/-   ##
=========================================
  Coverage     50.76%   50.76%           
  Complexity     1596     1596           
=========================================
  Files           238      238           
  Lines          9479     9479           
  Branches       1613     1613           
=========================================
  Hits           4812     4812           
  Misses         4020     4020           
  Partials        647      647           

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