chore: remove repeat words

[dashangcun]

High Level Overview of Change

Context of Change

remove repeat words

Type of Change

• Documentation update

API Impact

• Public API: New feature (new methods and/or new fields)
• Public API: Breaking change (in general, breaking changes should only impact the next api_version)
• libxrpl change (any change that may affect libxrpl or dependents of libxrpl)
• Peer protocol change (must be backward compatible or bump the peer protocol version)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.4%. Comparing base (0f32109) to head (cacf89e).

Additional details and impacted files

@@           Coverage Diff           @@
##           develop   #5053   +/-   ##
=======================================
  Coverage     71.4%   71.4%           
=======================================
  Files          796     796           
  Lines        67031   67031           
  Branches     10867   10866    -1     
=======================================
+ Hits         47827   47830    +3     
+ Misses       19204   19201    -3     

Files	Coverage Δ
src/xrpld/shamap/detail/TaggedPointer.h	100.0% <ø> (ø)
src/xrpld/shamap/detail/TaggedPointer.ipp	92.8% <ø> (ø)

... and 4 files with indirect coverage changes