Removes sealed class DateTimeType as it was not needed.

[abhikuhikar]

Resolves #388.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[am357]

Could we also add the @params here?

[abhikuhikar]

Added.

[codecov-commenter]

Codecov Report

Merging #489 (371b9d5) into main (58f5edb) will decrease coverage by 0.00%.
The diff coverage is 86.66%.

@@             Coverage Diff              @@
##               main     #489      +/-   ##
============================================
- Coverage     82.44%   82.43%   -0.01%     
  Complexity     1330     1330              
============================================
  Files           171      171              
  Lines         10907    10904       -3     
  Branches       1785     1785              
============================================
- Hits           8992     8989       -3     
  Misses         1368     1368              
  Partials        547      547              

Flag	Coverage Δ
CLI	20.86% <ø> (ø)
EXAMPLES	75.14% <ø> (ø)
LANG	84.83% <86.66%> (-0.01%)	⬇️
PTS	∅ <ø> (∅)
TEST_SCRIPT	79.68% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
lang/src/org/partiql/lang/ast/AstSerialization.kt	86.76% <0.00%> (ø)
lang/src/org/partiql/lang/ast/passes/AstWalker.kt	71.33% <0.00%> (ø)
lang/src/org/partiql/lang/ast/ast.kt	88.36% <90.00%> (-0.03%)	⬇️
...ng/src/org/partiql/lang/ast/ExprNodeToStatement.kt	93.94% <92.85%> (-0.02%)	⬇️
...ng/src/org/partiql/lang/ast/StatementToExprNode.kt	97.48% <100.00%> (-0.01%)	⬇️
...src/org/partiql/lang/ast/passes/AstRewriterBase.kt	94.80% <100.00%> (ø)
...ng/src/org/partiql/lang/eval/EvaluatingCompiler.kt	84.16% <100.00%> (ø)

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[am357]

ShipIt!