Removing default integtest.sh (1.x).

[dblock]

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

[codecov-commenter]

Codecov Report

Merging #209 (725a7d4) into 1.x (254510e) will increase coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##                1.x     #209    +/-   ##
==========================================
  Coverage     99.89%   99.89%            
- Complexity     2471     2512    +41     
==========================================
  Files           245      245            
  Lines          5748     5853   +105     
  Branches        333      342     +9     
==========================================
+ Hits           5742     5847   +105     
  Misses            5        5            
  Partials          1        1            

Impacted Files	Coverage Δ
...c/main/java/org/opensearch/sql/expression/DSL.java	100.00% <0.00%> (ø)
...in/java/org/opensearch/sql/data/type/ExprType.java	100.00% <0.00%> (ø)
...ava/org/opensearch/sql/data/type/ExprCoreType.java	100.00% <0.00%> (ø)
.../org/opensearch/sql/data/model/ExprValueUtils.java	100.00% <0.00%> (ø)
...rg/opensearch/sql/analysis/ExpressionAnalyzer.java	100.00% <0.00%> (ø)
...pensearch/sql/ppl/parser/AstExpressionBuilder.java	100.00% <0.00%> (ø)
...pensearch/sql/sql/parser/AstExpressionBuilder.java	100.00% <0.00%> (ø)
...nsearch/sql/expression/aggregation/Aggregator.java	100.00% <0.00%> (ø)
...arch/sql/expression/function/FunctionResolver.java	100.00% <0.00%> (ø)
...ch/sql/expression/aggregation/CountAggregator.java	100.00% <0.00%> (ø)
... and 7 more

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[joshuali925]

don't think this is relevant anymore (integtest.sh doesn't exist on 1.x), closing