docs(train): drop --dist loadfile from the shallow suite's README - #6215

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 43.72%. Comparing base (d3801bb) to head (8e786de).

❌ Your project check has failed because the head coverage (43.72%) is below the target coverage (65.00%). You can increase the head coverage or adjust the target coverage.

❗ There is a different number of reports uploaded between BASE (d3801bb) and HEAD (8e786de). Click for more details.

HEAD has 3 uploads less than BASE

Flag	BASE (d3801bb)	HEAD (8e786de)
	4	1

@@             Coverage Diff             @@
##           master    #6215       +/-   ##
===========================================
- Coverage   70.79%   43.72%   -27.07%     
===========================================
  Files         553      387      -166     
  Lines       67947    52399    -15548     
===========================================
- Hits        48101    22910    -25191     
- Misses      19846    29489     +9643