chore(config): remove unnecessary document folders from .gitignore

.gitignore

@@ -70,12 +70,8 @@ cover_letters/Cover_*.*
 !cover_letters/cover_example.tex
 
 # documents/ subfolder contents are personal — only README and folder structure are tracked
-documents/cv/**
-documents/linkedin/**
-documents/diplomas/**
-documents/references/**
 documents/applications/**
-documents/postings/**
+
 # Interview prep and experience records: these name the employers applied to,
 # quote what was submitted, and set out the candidate's weak points.
 documents/interview/**