chore: Remove unused less file from profile

[geido]

SUMMARY

It removes the unused main.less file.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

No visual changes

TESTING INSTRUCTIONS

1. Visit the profile
2. Make sure there are no visual changes

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 #19413 (07e783c) into master (4b92287) will increase coverage by 12.61%.
The diff coverage is n/a.

❗ Current head 07e783c differs from pull request most recent head e2ea820. Consider uploading reports for the commit e2ea820 to get more accurate results

@@             Coverage Diff             @@
##           master   #19413       +/-   ##
===========================================
+ Coverage   53.87%   66.48%   +12.61%     
===========================================
  Files        1678     1670        -8     
  Lines       64242    63968      -274     
  Branches     6539     6512       -27     
===========================================
+ Hits        34612    42531     +7919     
+ Misses      27935    19748     -8187     
+ Partials     1695     1689        -6     

Flag	Coverage Δ
javascript	51.32% <ø> (-0.03%)	⬇️
unit	?

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

Impacted Files	Coverage Δ
superset-frontend/src/profile/App.tsx	0.00% <ø> (ø)
superset/migrations/shared/utils.py	0.00% <0.00%> (-82.06%)	⬇️
superset/connectors/sqla/views.py	63.67% <0.00%> (-23.32%)	⬇️
...uperset-frontend/src/explore/exploreUtils/index.js	63.90% <0.00%> (-17.12%)	⬇️
superset-frontend/src/utils/urlUtils.ts	36.73% <0.00%> (-10.21%)	⬇️
...erset-frontend/src/components/EmptyState/index.tsx	69.23% <0.00%> (-5.13%)	⬇️
superset-frontend/src/components/Icons/Icon.tsx	95.23% <0.00%> (-4.77%)	⬇️
...nd/src/dashboard/components/gridComponents/Tab.jsx	80.48% <0.00%> (-3.19%)	⬇️
...rset-frontend/src/hooks/apiResources/dashboards.ts	33.33% <0.00%> (-3.04%)	⬇️
...rontend/src/views/CRUD/dashboard/DashboardList.tsx	55.14% <0.00%> (-2.96%)	⬇️
... and 354 more

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[michael-s-molina]

LGTM