fix: Revert "feat(explore): Show confirmation modal if user exits Explore without saving changes (#19993)

[kgabryje]

SUMMARY

We found some bugs in #19993. Let's revert for now and reopen when they're fixed.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[codecov]

Codecov Report

Merging #20092 (0fb418a) into master (e69f629) will increase coverage by 0.00%.
The diff coverage is 90.90%.

@@           Coverage Diff           @@
##           master   #20092   +/-   ##
=======================================
  Coverage   66.45%   66.46%           
=======================================
  Files        1721     1721           
  Lines       64481    64463   -18     
  Branches     6796     6794    -2     
=======================================
- Hits        42854    42844   -10     
+ Misses      19897    19891    -6     
+ Partials     1730     1728    -2     

Flag	Coverage Δ
javascript	51.35% <90.90%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
.../explore/components/ExploreViewContainer/index.jsx	52.57% <ø> (+0.46%)	⬆️
...rset-frontend/src/explore/exploreUtils/formData.ts	85.71% <ø> (-3.18%)	⬇️
...-frontend/src/components/AlteredSliceTag/index.jsx	88.57% <90.90%> (+0.81%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update e69f629...0fb418a. Read the comment docs.