refactor(storage): remove unused async/remote/subprocess methods/storages

[jansegre]

No description provided.

[codecov-commenter]

Codecov Report

Merging #228 (dd58365) into dev (33efc76) will decrease coverage by 0.32%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##              dev     #228      +/-   ##
==========================================
- Coverage   83.32%   82.99%   -0.33%     
==========================================
  Files         147      146       -1     
  Lines       14245    13575     -670     
  Branches     1996     1913      -83     
==========================================
- Hits        11869    11267     -602     
+ Misses       1949     1910      -39     
+ Partials      427      398      -29     

Impacted Files	Coverage Δ
hathor/transaction/storage/__init__.py	80.00% <ø> (+6.66%)	⬆️
hathor/transaction/storage/binary_storage.py	98.56% <100.00%> (ø)
hathor/transaction/storage/cache_storage.py	98.24% <100.00%> (+0.25%)	⬆️
hathor/transaction/storage/compact_storage.py	96.52% <100.00%> (ø)
hathor/transaction/storage/memory_storage.py	90.90% <100.00%> (ø)
hathor/transaction/storage/rocksdb_storage.py	100.00% <100.00%> (ø)
hathor/transaction/storage/transaction_storage.py	97.57% <100.00%> (+0.81%)	⬆️
hathor/util.py	75.60% <0.00%> (-1.63%)	⬇️
hathor/p2p/manager.py	68.93% <0.00%> (-0.86%)	⬇️
hathor/transaction/base_transaction.py	92.97% <0.00%> (-0.63%)	⬇️
... and 2 more

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