remove collectionCompatVersion from build.sbt

Author: halotukozak

build.sbt

@@ -22,7 +22,6 @@ inThisBuild(Seq(
 val CompileAndTest = "compile->compile;test->test"
 
 val parserCombinatorsVersion = "1.1.2"
-val collectionCompatVersion = "2.8.1"
 val avsCommonsVersion = "2.10.0"
 val jettyVersion = "9.4.51.v20230217" // Tests only
 val vaadinVersion = "6.8.18" // Tests only