[MEX-437] no exit amount

[claudiulataretu]

Reasoning

• new farm v2 doesn't require the exit amount argument for exitFarm endpoint

Proposed Changes

• removed exit amount argument from exitFarm transaction generation

How to test

• N/A

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (4014495) 56.65% compared to head (286be00) 56.65%.
Report is 2 commits behind head on feat/xexchange-v3.

Additional details and impacted files

@@                Coverage Diff                 @@
##           feat/xexchange-v3    #1281   +/-   ##
==================================================
  Coverage              56.65%   56.65%           
==================================================
  Files                    242      242           
  Lines                   8627     8627           
  Branches                 616      616           
==================================================
  Hits                    4888     4888           
  Misses                  3200     3200           
  Partials                 539      539           

Flag	Coverage Δ
unittests	56.65% <100.00%> (ø)

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