refactor: Quieten library loads

[sof202]

Description

This pull request will suppress all package start-up messages that are annoyingly sent to the standard error stream in the DNAm preprocessing(QC) pipeline. It's annoying that these messages get sent to the standard error stream as the error logs from running the pipeline are next to useless because of it (hundreds of lines of basically useless information, making it hard to find the actual error). If library loading is useful to someone that uses these scripts, then we can always change this so that library() calls print to the standard output stream instead.

I also noticed that a package was never being used, so I removed its loading (slight performance gain).

Issue ticket number

This pull request is to address issue: #294.

Type of pull request

• Bug fix
• New feature/enhancement
• Code refactor
• Documentation update

Checklist

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have tested my code to check that it is functional
• I have used linters to check for common sources of errors
• I have implemented fail safes in my code to account for edge cases
• I have made the corresponding changes to the documentation