Remove obsolete pragma header from default dynamic route headers.

[dlongley]

No description provided.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.49%. Comparing base (7ee9bc8) to head (8c3ce53).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #64      +/-   ##
==========================================
- Coverage   94.50%   94.49%   -0.01%     
==========================================
  Files           3        3              
  Lines         782      781       -1     
==========================================
- Hits          739      738       -1     
  Misses         43       43              

Files with missing lines	Coverage Δ
lib/index.js	93.19% <100.00%> (-0.02%)	⬇️

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