Removed antlr comment

Signed-off-by: Prabhu Subramanian <prabhu@appthreat.com>

Author: prabhu

project/Versions.scala

@@ -1,8 +1,6 @@
 /* reads version declarations from /build.sbt so that we can declare them in one place */
 object Versions {
   val cpg = parseVersion("cpgVersion")
-  // Dont upgrade antlr to 4.10 or above since those versions require java 11 or higher which
-  // causes problems upstreams.
   val antlr         = "4.13.1"
   val scalatest     = "3.2.17"
   val cats          = "3.5.3"