Revert "fix EthersDB deadlock (#1089)"

[rakita]

This reverts commit 0055d58.

[github-actions]

Valgrind Results:

==4041== Cachegrind, a cache and branch-prediction profiler
==4041== Copyright (C) 2002-2017, and GNU GPL'd, by Nicholas Nethercote et al.
==4041== Using Valgrind-3.18.1 and LibVEX; rerun with -h for copyright info
==4041== Command: target/release/snailtracer
==4041== 
--4041-- warning: L3 cache found, using its data for the LL simulation.
Snailtracer Host+Interpreter benchmark (2.1s) ...            not enough samples
==4041== 
==4041== I   refs:      471,783,475
==4041== I1  misses:          7,162
==4041== LLi misses:          2,916
==4041== I1  miss rate:        0.00%
==4041== LLi miss rate:        0.00%
==4041== 
==4041== D   refs:      229,163,513  (152,345,487 rd   + 76,818,026 wr)
==4041== D1  misses:        350,585  (    210,293 rd   +    140,292 wr)
==4041== LLd misses:        137,580  (      4,056 rd   +    133,524 wr)
==4041== D1  miss rate:         0.2% (        0.1%     +        0.2%  )
==4041== LLd miss rate:         0.1% (        0.0%     +        0.2%  )
==4041== 
==4041== LL refs:           357,747  (    217,455 rd   +    140,292 wr)
==4041== LL misses:         140,496  (      6,972 rd   +    133,524 wr)
==4041== LL miss rate:          0.0% (        0.0%     +        0.2%  )