[Backport] Refactored multiples conditions which could be grouped in a single on…

[tiagosampaio]

Original Pull Request

#17123
Some conditions were divided in multiple ones when it was not really necessary in captcha extension

Description

Some captcha observers contained multiple conditions when it was not necessary

Fixed Issues (if relevant)

Code style improvement

Manual testing scenarios

N/A

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)

Original PR
#17123

[magento-engcom-team]

Hi @tiagosampaio. Thank you for your contribution
Here is some useful tips how you can test your changes using Magento test environment.
Add the comment under your pull request to deploy test or vanilla Magento instance:

• @magento-engcom-team give me test instance - deploy test instance based on PR changes
• @magento-engcom-team give me {$VERSION} instance - deploy vanilla Magento instance

For more details, please, review the Magento Contributor Assistant documentation

[ihor-sviziev]

Hi @tiagosampaio,
We already have backport to 2.2 PR: #17203
I'm closing this PR as duplicate.