Remove unncessary requirements for HDWallet derivation

[cffls]

Fixes #460

[codecov]

Codecov Report

❌ Patch coverage is 75.00000% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 89.77%. Comparing base (2de335e) to head (f6d9a20).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
pycardano/crypto/bip32.py	75.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #463   +/-   ##
=======================================
  Coverage   89.76%   89.77%           
=======================================
  Files          33       33           
  Lines        4886     4890    +4     
  Branches      738      740    +2     
=======================================
+ Hits         4386     4390    +4     
  Misses        321      321           
  Partials      179      179           

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[tacmota]

Looks good to me. Later we can look into the type check problem.