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Why is this an issue?

  The TObject.Free method already performs a nil check before freeing. Additional
  checks are redundant.

How to fix it
Remove the nil check:
if Assigned(Foo) then begin
  Foo.Free;
end;

if Bar <> nil then begin
  FreeAndNil(Bar);
end;

Foo.Free;
FreeAndNil(Bar);

Resources

  
    
      RAD Studio API documentation: System.TObject.Free
    
  
  
    
      RAD Studio API documentation: System.SysUtils.FreeAndNil