Remove password policy admin setting

[joshcanhelp]

Changes

Remove database connection password policy management in the settings panel.

[codecov-io]

Codecov Report

Merging #629 into master will increase coverage by <.01%.
The diff coverage is 50%.

@@             Coverage Diff              @@
##             master     #629      +/-   ##
============================================
+ Coverage     37.83%   37.83%   +<.01%     
  Complexity     1243     1243              
============================================
  Files            51       51              
  Lines          3846     3843       -3     
============================================
- Hits           1455     1454       -1     
+ Misses         2391     2389       -2

Impacted Files	Coverage Δ	Complexity Δ
lib/admin/WP_Auth0_Admin_Features.php	26.5% <ø> (+0.62%)	33 <0> (ø)	⬇️
lib/WP_Auth0_Options.php	84.15% <ø> (-0.16%)	28 <0> (ø)
lib/WP_Auth0_Api_Operations.php	72.09% <ø> (ø)	12 <0> (ø)	⬇️
lib/WP_Auth0_DBManager.php	21.33% <0%> (ø)	86 <0> (ø)	⬇️
...ib/initial-setup/WP_Auth0_InitialSetup_Consent.php	62.24% <100%> (-0.39%)	26 <0> (ø)
lib/WP_Auth0_LoginManager.php	19.94% <0%> (+0.11%)	121% <0%> (ø)	⬇️

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