chore: Remove repetitive word in multiple files

[chuanshanjida]

High Level Overview of Change

Context of Change

remove repetitive word in multi files

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 81.6%. Comparing base (852fbe9) to head (f35c610).
⚠️ Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff           @@
##           develop   #6978   +/-   ##
=======================================
  Coverage     81.6%   81.6%           
=======================================
  Files         1010    1010           
  Lines        75992   75992           
  Branches      7605    7601    -4     
=======================================
+ Hits         62002   62012   +10     
+ Misses       13990   13980   -10     

Files with missing lines	Coverage Δ
src/libxrpl/tx/transactors/dex/OfferCreate.cpp	93.2% <ø> (ø)
src/libxrpl/tx/transactors/escrow/EscrowCreate.cpp	100.0% <ø> (ø)
...ansactors/payment_channel/PaymentChannelCreate.cpp	97.0% <ø> (ø)

... and 4 files with indirect coverage changes

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