Back out "Phase 3: Add Self type annotations to fluent/clone methods"

[Balandat]

Summary: Unlanding this temporarily for compatibility reasons.

Differential Revision: D92858617

[meta-codesync]

@Balandat has exported this pull request. If you are a Meta employee, you can view the originating Diff in D92858617.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.76%. Comparing base (dbdebb7) to head (ceb7d65).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4882   +/-   ##
=======================================
  Coverage   96.75%   96.76%           
=======================================
  Files         591      591           
  Lines       61955    61950    -5     
=======================================
- Hits        59947    59943    -4     
+ Misses       2008     2007    -1     

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[meta-codesync]

This pull request has been merged in 541c458.