Cleanup player references

[jkasten2]

Description

1 Line Summary

Remove code related to v15 APIs and behavior, such as player references.

Details

Motivation to removing this deadcode is to make upcoming changes easier to make. This PR also results in a noticeable size reduction in the SDK.

Scope

This PR addresses deleting anything related to v15 APIs and behavior. Some minor refactoring was done to clean up some related code paths.

Validation

Tests

Test on Windows 11 23H2 with Chrome 119.

• addTag
• Subscribing for notifications
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• Confirmed deliveries
• Session count and time
• Slidedown
• Bell
• Custom subscribe link

Tested on macOS 13.6.1 Safari 17.1

• Subscribing for notifications
• Clicking a notification
• Slidedown
• Bell
• Custom subscribe link

Tested on iOS 16.7.2

• Subscribing
• Clicking a notification
• Slidedown
• Bell
• Custom subscribe link

Info

Checklist

• [X] All the automated tests pass or I explained why that is not possible
• [X] I have personally tested this on my machine or explained why that is not possible
• [X] I have included test coverage for these changes or explained why they are not needed

Programming Checklist Interfaces:

• [X] Don't use default export
• [X] New interfaces are in model files

Functions:

• [X] Don't use default export
• [X] All function signatures have return types
• [X] Helpers should not access any data but rather be given the data to operate on.

Typescript:

• [X] No Typescript warnings
• [X] Avoid silencing null/undefined warnings with the exclamation point

Other:

• [X] Iteration: refrain from using elem of array syntax. Prefer forEach or use map
• [X] Avoid using global OneSignal accessor for context if possible. Instead, we can pass it to function/constructor so that we don't call OneSignal.context

Screenshots

Sizes of a production build in this PR:

webpack 5.80.0 compiled with 3 warnings in 8942 ms

─ ./build/bundles/OneSignalSDK.page.js
  ✔ ./build/bundles/OneSignalSDK.page.js            848B < 1 kB gzip  

─ ./build/bundles/OneSignalSDK.page.es6.js
  ✔ ./build/bundles/OneSignalSDK.page.es6.js        62.7KB < 79 kB gzip  

─ ./build/bundles/OneSignalSDK.sw.js
  ✔ ./build/bundles/OneSignalSDK.sw.js              35.33KB < 41 kB gzip  

─ ./build/bundles/OneSignalSDK.page.styles.css
  ✔ ./build/bundles/OneSignalSDK.page.styles.css    8.13KB < 9 kB gzip  

  4 checks passed   

Info

Checklist

• [X] I have included screenshots/recordings of the intended results or explained why they are not needed

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Related Tickets

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This change is