Remove custom theme hook and template for varbase_heroslider view override as switched to UI Patterns ~2.0 with a views-view-heroslider component in Vartheme BS5

Problem/Motivation

As switched to UI Patterns ~2.0 with a views-view-heroslider component in Vartheme BS5
The manual template mapping for components is no longer needed

Proposed resolution

• Remove leftover template files and move all that logic to Vartheme BS5 and UI Patterns ~2.0

Remaining tasks

• ✅ File an issue about this project
• ✅ Addition/Change/Update/Fix to this project
• ✅ Testing to ensure no regression
• ➖ Automated unit/functional testing coverage
• ➖ Developer Documentation support on feature change/addition
• ➖ User Guide Documentation support on feature change/addition
• ➖ UX/UI designer responsibilities
• ➖ Accessibility and Readability
• ✅ Code review from 1 Varbase core team member
• ✅ Full testing and approval
• ✅ Credit contributors
• ✅ Review with the product owner
• ✅ Update Release Notes and Update Helper on new feature change/addition
• ✅ Release varbase-10.1.0-alpha2, varbase_heroslider-1.1.0-alpha5

Varbase update type

• ✅ No Update
• ➖ Optional Update
• ➖ Forced Update
• ➖ Forced Update if Unchanged

User interface changes

• N/A

API changes

• N/A

Data model changes

• N/A

Release notes snippet

• Issue #3538600: Removed custom theme hook and template for varbase_heroslider view override as switched to UI Patterns ~2.0 with a views-view-heroslider component in Vartheme BS5