♻️ Refactored PruneStates()

[greymistcube]

Since Bencodex's fingerprinting was removed, libplanet has lost its support for backward compatibility with IStateStore that has used fingerprinting at some point (sadly which is the case for 9c). Preserving IStateStore compatibility was never properly implemented in the first place, so this haphazardly implemented incomplete feature has been removed. 😑

I don't think PruneStates() can be implemented properly in any useful manner. As IStateStore grows, PruneStates() will always be too slow to use unless the IStateStore in question is pruned frequently and continuously. Using CopyStates() and replacing the original IStateStore with a copied IStateStore will always be a more practical solution for this purpose.

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This PR has 102 quantified lines of changes. In general, a change size of upto 200 lines is ideal for the best PR experience!

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Label      : Medium
Size       : +58 -44
Percentile : 40.4%

Total files changed: 4

Change summary by file extension:
.cs : +58 -44

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[greymistcube]

Decided to remove PruneStates() altogether instead of trying to maintain it. 🙄