chore: remove superfluous test code

[abachman]

What changed, and why?

In the process of working on #6491, I noticed that there was extra view spec setup code that I had copy-pasted into my new view specs.

Turned out to be superfluous, so I tried take the same code out everywhere else it appeared. These are the tests where that could be done safely!

How is this tested?

Deleted code, Rspec suite still passes: ✅

Screenshots please :)

[compwron]

lgtm if CI goes green

[Copilot]

Pull Request Overview

This PR removes redundant allow(view).to receive(:current_user).and_return(user) test setup code from multiple view specification files. The removed code was superfluous as the test suite continues to pass without it, indicating that other test setup mechanisms (like sign_in user or enable_pundit) are sufficient for providing the necessary authentication context.

• Removes duplicate current_user stubbing across 10 view spec files
• Cleans up test setup while maintaining existing functionality
• Simplifies test code by eliminating unnecessary mock configurations

Reviewed Changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
spec/views/volunteers/index.html.erb_spec.rb	Removed redundant current_user stubbing
spec/views/reimbursements/index.html.erb_spec.rb	Removed redundant current_user stubbing
spec/views/placements/edit.html.erb_spec.rb	Removed redundant current_user stubbing
spec/views/mileage_rates/index.html.erb_spec.rb	Removed redundant current_user stubbing
spec/views/court_dates/show.html.erb_spec.rb	Removed redundant current_user and current_organization stubbing
spec/views/court_dates/edit.html.erb_spec.rb	Removed redundant current_user stubbing
spec/views/casa_cases/new.html.erb_spec.rb	Removed redundant current_user and current_organization stubbing
spec/views/casa_admins/admins_table.html.erb_spec.rb	Removed redundant current_user stubbing
spec/views/banners/new.html.erb_spec.rb	Removed redundant current_user stubbing from multiple test cases
spec/views/all_casa_admins/casa_orgs/show.html.erb_spec.rb	Removed redundant current_user stubbing

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The base branch was changed.