Remove has route

[PanGan21]

Closes: #503

Description

---

PR author checklist:

• Added changelog entry, using unclog.
• Added tests.
• Linked to GitHub issue.
• Updated code comments and documentation (e.g., docs/).
• Tagged one reviewer who will be the one responsible for shepherding this PR.

Reviewer checklist:

• Reviewed Files changed in the GitHub PR explorer.
• Manually tested (in case integration/unit/mock tests are absent).

[Farhad-Shabani]

Appreciate @PanGan21 your contribution. This works 🙏

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.01 ⚠️

Comparison is base (1c5b50b) 72.33% compared to head (ba834bc) 72.32%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #740      +/-   ##
==========================================
- Coverage   72.33%   72.32%   -0.01%     
==========================================
  Files         116      116              
  Lines       15529    15510      -19     
==========================================
- Hits        11233    11218      -15     
+ Misses       4296     4292       -4     

Impacted Files	Coverage Δ
crates/ibc/src/core/handler.rs	90.14% <ø> (+1.53%)	⬆️
crates/ibc/src/core/router.rs	81.19% <ø> (ø)
crates/ibc/src/mock/context.rs	73.84% <ø> (-0.07%)	⬇️

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[plafer]

LGTM! Thank you!