Removed default integtest.sh (1.1)

[dblock]

Coming from opensearch-project/opensearch-build#497, removing default integtest.sh on 1.x branch.

[codecov-commenter]

Codecov Report

Merging #160 (0d19fe3) into 1.1 (074fb31) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##                1.1     #160   +/-   ##
=========================================
  Coverage     63.41%   63.41%           
  Complexity      309      309           
=========================================
  Files           101      101           
  Lines          4401     4401           
  Branches        669      669           
=========================================
  Hits           2791     2791           
  Misses         1442     1442           
  Partials        168      168           

Flag	Coverage Δ
dashboards-reports	76.01% <ø> (ø)
reports-scheduler	53.42% <ø> (ø)

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