remove unused test code

[Nothing4You]

What do these changes do?

remove unused session_id test fixture
this was introduced in #275 for running the database in a container but is no longer needed.

Are there changes in behavior for the user?

no

[codecov]

Codecov Report

Merging #710 (b2067a7) into master (32cbeac) will decrease coverage by 0.55%.
The diff coverage is n/a.

❗ Current head b2067a7 differs from pull request most recent head e3bce0e. Consider uploading reports for the commit e3bce0e to get more accurate results

@@            Coverage Diff             @@
##           master     #710      +/-   ##
==========================================
- Coverage   92.68%   92.13%   -0.56%     
==========================================
  Files          35       35              
  Lines        5415     5404      -11     
  Branches      581      579       -2     
==========================================
- Hits         5019     4979      -40     
- Misses        309      332      +23     
- Partials       87       93       +6     

Flag	Coverage Δ
ubuntu-latest_3.10_mariadb-10.2	?
ubuntu-latest_3.10_mariadb-10.3	?
ubuntu-latest_3.10_mariadb-10.4	?
ubuntu-latest_3.10_mariadb-10.5	?
ubuntu-latest_3.10_mariadb-10.6	?
ubuntu-latest_3.10_mariadb-10.7	?
ubuntu-latest_3.10_mysql-5.7	90.26% <ø> (+0.03%)	⬆️
ubuntu-latest_3.10_mysql-8.0	91.67% <ø> (+0.03%)	⬆️
ubuntu-latest_3.7_mariadb-10.2	?
ubuntu-latest_3.7_mariadb-10.3	?
ubuntu-latest_3.7_mariadb-10.4	?
ubuntu-latest_3.7_mariadb-10.5	?
ubuntu-latest_3.7_mariadb-10.6	?
ubuntu-latest_3.7_mariadb-10.7	?
ubuntu-latest_3.7_mysql-5.7	89.72% <ø> (+0.03%)	⬆️
ubuntu-latest_3.7_mysql-8.0	91.21% <ø> (+0.04%)	⬆️
ubuntu-latest_3.8_mariadb-10.2	?
ubuntu-latest_3.8_mariadb-10.3	?
ubuntu-latest_3.8_mariadb-10.4	?
ubuntu-latest_3.8_mariadb-10.5	?
ubuntu-latest_3.8_mariadb-10.6	?
ubuntu-latest_3.8_mariadb-10.7	?
ubuntu-latest_3.8_mysql-5.7	90.30% <ø> (+0.03%)	⬆️
ubuntu-latest_3.8_mysql-8.0	91.69% <ø> (+0.03%)	⬆️
ubuntu-latest_3.9_mariadb-10.2	?
ubuntu-latest_3.9_mariadb-10.3	?
ubuntu-latest_3.9_mariadb-10.4	?
ubuntu-latest_3.9_mariadb-10.5	?
ubuntu-latest_3.9_mariadb-10.6	?
ubuntu-latest_3.9_mariadb-10.7	?
ubuntu-latest_3.9_mysql-5.7	90.17% <ø> (+0.03%)	⬆️
ubuntu-latest_3.9_mysql-8.0	91.56% <ø> (+0.03%)	⬆️

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

Impacted Files	Coverage Δ
tests/conftest.py	88.00% <ø> (+0.25%)	⬆️
tests/test_basic.py	97.88% <ø> (-0.10%)	⬇️
tests/test_deserialize_cursor.py	69.69% <0.00%> (-30.31%)	⬇️

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