remove deprecated with await pool

[Nothing4You]

What do these changes do?

Deprecated method Pool.get was removed
Deprecated with await pool syntax was removed.

Are there changes in behavior for the user?

Yes, see above.

Related issue number

no

Checklist

• I think the code is well written
• Unit tests for the changes exist
• Documentation reflects the changes
• Add a new news fragment to CHANGES.txt

[codecov]

Codecov Report

Merging #703 (4c555f3) into master (1558b4a) will decrease coverage by 0.80%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #703      +/-   ##
==========================================
- Coverage   86.50%   85.69%   -0.81%     
==========================================
  Files          12       12              
  Lines        2082     2076       -6     
  Branches      341      341              
==========================================
- Hits         1801     1779      -22     
- Misses        216      232      +16     
  Partials       65       65              

Flag	Coverage Δ
ubuntu-latest_3.10_mariadb-10.2	82.22% <100.00%> (-0.82%)	⬇️
ubuntu-latest_3.10_mariadb-10.3	82.22% <100.00%> (-0.82%)	⬇️
ubuntu-latest_3.10_mariadb-10.4	82.22% <100.00%> (-0.82%)	⬇️
ubuntu-latest_3.10_mariadb-10.5	82.22% <100.00%> (-0.82%)	⬇️
ubuntu-latest_3.10_mariadb-10.6	82.22% <100.00%> (-0.82%)	⬇️
ubuntu-latest_3.10_mariadb-10.7	82.22% <100.00%> (-0.82%)	⬇️
ubuntu-latest_3.10_mysql-5.7	83.09% <100.00%> (-0.82%)	⬇️
ubuntu-latest_3.10_mysql-8.0	84.97% <100.00%> (-0.82%)	⬇️
ubuntu-latest_3.7_mariadb-10.2	81.75% <100.00%> (-0.85%)	⬇️
ubuntu-latest_3.7_mariadb-10.3	81.75% <100.00%> (-0.85%)	⬇️
ubuntu-latest_3.7_mariadb-10.4	81.75% <100.00%> (-0.85%)	⬇️
ubuntu-latest_3.7_mariadb-10.5	81.75% <100.00%> (-0.85%)	⬇️
ubuntu-latest_3.7_mariadb-10.6	81.75% <100.00%> (-0.85%)	⬇️
ubuntu-latest_3.7_mariadb-10.7	81.75% <100.00%> (-0.85%)	⬇️
ubuntu-latest_3.7_mysql-5.7	82.64% <100.00%> (-0.84%)	⬇️
ubuntu-latest_3.7_mysql-8.0	84.56% <100.00%> (-0.84%)	⬇️
ubuntu-latest_3.8_mariadb-10.2	82.17% <100.00%> (-0.83%)	⬇️
ubuntu-latest_3.8_mariadb-10.3	82.17% <100.00%> (-0.83%)	⬇️
ubuntu-latest_3.8_mariadb-10.4	82.17% <100.00%> (-0.83%)	⬇️
ubuntu-latest_3.8_mariadb-10.5	82.17% <100.00%> (-0.83%)	⬇️
ubuntu-latest_3.8_mariadb-10.6	82.17% <100.00%> (-0.83%)	⬇️
ubuntu-latest_3.8_mariadb-10.7	82.17% <100.00%> (-0.83%)	⬇️
ubuntu-latest_3.8_mysql-5.7	83.04% <100.00%> (-0.82%)	⬇️
ubuntu-latest_3.8_mysql-8.0	84.87% <100.00%> (?)
ubuntu-latest_3.9_mariadb-10.2	82.17% <100.00%> (-0.83%)	⬇️
ubuntu-latest_3.9_mariadb-10.3	82.17% <100.00%> (-0.83%)	⬇️
ubuntu-latest_3.9_mariadb-10.4	82.17% <100.00%> (-0.83%)	⬇️
ubuntu-latest_3.9_mariadb-10.5	82.17% <100.00%> (-0.83%)	⬇️
ubuntu-latest_3.9_mariadb-10.6	82.17% <100.00%> (-0.83%)	⬇️
ubuntu-latest_3.9_mariadb-10.7	82.17% <100.00%> (-0.83%)	⬇️
ubuntu-latest_3.9_mysql-5.7	83.04% <100.00%> (-0.82%)	⬇️
ubuntu-latest_3.9_mysql-8.0	84.87% <100.00%> (-0.82%)	⬇️

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

Impacted Files	Coverage Δ
aiomysql/pool.py	96.87% <100.00%> (-0.12%)	⬇️
aiomysql/utils.py	71.57% <0.00%> (-16.85%)	⬇️

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[Nothing4You]

I'm not sure about the with await pool syntax - in aiopg's pool this is not deprected.
in aio-libs/aiopg#517 __iter__ was removed in favor of __await__, with (await pool) as conn seems to still be supported syntax.

[Nothing4You]

Pool.get removal split to #706