Remove duplicate code

[rohaid-bakh]

I removed a section of code in Spam2/_nodes.html.erb and added select_all() that selects all buttons.
#10897
Fixes #10897

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This should be handed off to #10952 when possible, thank you

[gitpod-io]

[codeclimate]

Code Climate has analyzed commit 0bcd353 and detected 0 issues on this pull request.

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[github-actions]

This pull request generated screenshots of many common pages in the running app. You should be able to download and view them here:
https://github.com/publiclab/plots2/suites/5962592906/artifacts/204860254

[rohaid-bakh]

@TildaDares @jywarren I'd appreciate it if I could get this pull request reviewed, thank you.

[TildaDares]

Thanks @rohaid-bakh!! Great work.

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[TildaDares]

Congratulations @rohaid-bakh!!