docs: remove .pdf manual from docs

[cadenmyers13]

No description provided.

[cadenmyers13]

@sbillinge ready for review

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.10%. Comparing base (f228822) to head (5060af7).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@ Coverage Diff @@## main #295 +/- ##
=======================================
Coverage 95.10% 95.10% =======================================
Files 23 23 Lines 1123 1123 =======================================
Hits 1068 1068 Misses 55 55 

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