Del applications dir

[zzjin]

As it already been moved to a seperated repo.

Signed-off-by: zzjin [email protected]

[codecov]

Codecov Report

Merging #1340 (36c30ca) into main (84b5129) will not change coverage.
The diff coverage is n/a.

❗ Current head 36c30ca differs from pull request most recent head 83b823c. Consider uploading reports for the commit 83b823c to get more accurate results

@@           Coverage Diff           @@
##             main    #1340   +/-   ##
=======================================
  Coverage   53.09%   53.09%           
=======================================
  Files           5        5           
  Lines         420      420           
=======================================
  Hits          223      223           
  Misses        181      181           
  Partials       16       16           

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