Remove spurious truthiness checks on serverSecrets

[paulmelnikow]

serverSecrets is always truthy.

Close #2606

[shields-ci]

	Warnings
⚠️	This PR modified service code for bintray but not its test code. That's okay so long as it's refactoring existing code.
⚠️	This PR modified service code for sonarqube but not its test code. That's okay so long as it's refactoring existing code.
⚠️	📚 Remember to ensure any changes to serverSecrets in services/jenkins/jenkins-coverage.service.js are reflected in the server secrets documentation
⚠️	📚 Remember to ensure any changes to serverSecrets in services/jira/jira-base.js are reflected in the server secrets documentation
⚠️	This PR modified service code for sensiolabs but not its test code. That's okay so long as it's refactoring existing code.
⚠️	📚 Remember to ensure any changes to serverSecrets in services/sonarqube/sonarqube.service.js are reflected in the server secrets documentation
⚠️	📚 Remember to ensure any changes to serverSecrets in services/jenkins/jenkins-tests.service.js are reflected in the server secrets documentation
⚠️	📚 Remember to ensure any changes to serverSecrets in services/sensiolabs/sensiolabs.service.js are reflected in the server secrets documentation
⚠️	📚 Remember to ensure any changes to serverSecrets in services/azure-devops/azure-devops-helpers.js are reflected in the server secrets documentation
⚠️	📚 Remember to ensure any changes to serverSecrets in services/bintray/bintray.service.js are reflected in the server secrets documentation
⚠️	This PR modified service code for nexus but not its test code. That's okay so long as it's refactoring existing code.
⚠️	📚 Remember to ensure any changes to serverSecrets in services/teamcity/teamcity-base.js are reflected in the server secrets documentation
⚠️	This PR modified service code for jenkins but not its test code. That's okay so long as it's refactoring existing code.
⚠️	📚 Remember to ensure any changes to serverSecrets in services/nexus/nexus.service.js are reflected in the server secrets documentation
⚠️	📚 Remember to ensure any changes to serverSecrets in services/jenkins/jenkins-build.service.js are reflected in the server secrets documentation

	Messages
📖	✨ Thanks for your contribution to Shields, @paulmelnikow!

Generated by 🚫 dangerJS against 0a5a9dd

[shields-deployment]

This pull request was merged to master branch. This change is now waiting for deployment, which will usually happen within a few days. Stay tuned by joining our #ops channel on Discord!

After deployment, changes are copied to gh-pages branch: