remove clippy_vec_init_and_push and dup code

[nkysg]

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

Issue Number: N/A

What is the new behavior?

fix code style and remove dup code

Other information

[codecov]

Codecov Report

Merging #3311 (89197c8) into master (b77d036) will decrease coverage by 0.33%.
The diff coverage is 15.60%.

@@            Coverage Diff             @@
##           master    #3311      +/-   ##
==========================================
- Coverage   32.01%   31.68%   -0.32%     
==========================================
  Files         500      500              
  Lines       46484    46760     +276     
  Branches    21037    21257     +220     
==========================================
- Hits        14875    14811      -64     
- Misses      17888    17947      +59     
- Partials    13721    14002     +281     

Flag	Coverage Δ
unittests	31.68% <15.60%> (-0.32%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
chain/api/src/message.rs	0.00% <0.00%> (ø)
chain/api/src/service.rs	10.17% <0.00%> (+0.42%)	⬆️
chain/service/src/chain_service.rs	22.56% <0.00%> (-0.52%)	⬇️
chain/src/chain.rs	34.19% <0.00%> (+0.43%)	⬆️
chain/src/verifier/mod.rs	39.84% <ø> (+0.17%)	⬆️
...e-jellyfish-merkle/src/node_type/node_type_test.rs	37.98% <ø> (ø)
executor/src/account.rs	10.35% <0.00%> (-3.94%)	⬇️
network-rpc/src/rpc.rs	19.32% <0.00%> (+1.37%)	⬆️
node/src/node.rs	10.49% <0.00%> (-1.31%)	⬇️
rpc/client/src/chain_watcher.rs	10.59% <0.00%> (ø)
... and 85 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update a03b8e9...89197c8. Read the comment docs.

[github-actions]

Benchmark for a6b451c

Click to view benchmark

Test	Base	PR	%
accumulator_append	595.7±14.93µs	595.3±13.36µs	-0.07%
block_apply/block_apply_10	268.9±2.98ms	267.0±0.99ms	-0.71%
block_apply/block_apply_1000	27.5±0.09s	27.6±0.03s	+0.36%
get_with_proof/db_store	36.2±0.40µs	35.9±0.68µs	-0.83%
get_with_proof/mem_store	31.2±0.27µs	30.8±0.33µs	-1.28%
put_and_commit/db_store/1	96.4±5.11µs	96.1±5.62µs	-0.31%
put_and_commit/db_store/10	869.2±42.89µs	861.8±40.11µs	-0.85%
put_and_commit/db_store/100	7.4±0.31ms	7.4±0.29ms	0.00%
put_and_commit/db_store/5	447.0±25.18µs	438.0±23.37µs	-2.01%
put_and_commit/db_store/50	3.8±0.16ms	3.8±0.15ms	0.00%
put_and_commit/mem_store/1	62.1±5.70µs	61.6±5.64µs	-0.81%
put_and_commit/mem_store/10	579.0±48.60µs	575.1±47.09µs	-0.67%
put_and_commit/mem_store/100	5.7±0.82ms	5.6±0.33ms	-1.75%
put_and_commit/mem_store/5	292.9±25.59µs	288.9±24.64µs	-1.37%
put_and_commit/mem_store/50	2.9±0.19ms	2.8±0.19ms	-3.45%
query_block/query_block_in(10)_times(100)	3.9±0.22ms	3.9±0.13ms	0.00%
query_block/query_block_in(10)_times(1000)	38.3±1.15ms	38.3±0.68ms	0.00%
query_block/query_block_in(10)_times(10000)	382.1±6.93ms	382.9±4.26ms	+0.21%
query_block/query_block_in(1000)_times(100)	954.9±7.28µs	954.2±10.79µs	-0.07%
query_block/query_block_in(1000)_times(1000)	9.5±0.05ms	9.4±0.08ms	-1.05%
query_block/query_block_in(1000)_times(10000)	95.0±0.58ms	95.0±1.11ms	0.00%
storage_transaction	1069.5±293.21µs	1063.7±288.80µs	-0.54%
vm/transaction_execution/1	316.7±0.88ms	325.2±2.81ms	+2.68%
vm/transaction_execution/10	99.7±1.21ms	100.8±0.73ms	+1.10%
vm/transaction_execution/20	91.6±1.25ms	92.7±0.52ms	+1.20%
vm/transaction_execution/5	121.7±0.88ms	123.7±0.40ms	+1.64%
vm/transaction_execution/50	104.8±5.95ms	104.5±0.50ms	-0.29%