Remove failing function and test suite

Author: jad-hamza

src/main/scala/z3/scala/Z3Context.scala

@@ -1024,24 +1024,6 @@ sealed class Z3Context(val config: Map[String, String]) {
     res
   }
 
-  // XXX: this is a HUGE hack to get around the fact that the Z3 api doesn't
-  //      provide a handle to the absolute value function.
-  def getAbsFuncDecl(): Z3FuncDecl = {
-    val ast = parseSMTLIB2String("""
-      (declare-fun x () Int)
-      (declare-fun y () Int)
-      (assert (= y (abs x)))
-    """)
-
-    getASTKind(ast) match {
-      case Z3AppAST(_, Seq(_, absAst)) => getASTKind(absAst) match {
-        case Z3AppAST(decl, _) => decl
-        case c => error("Unexpected ast kind " + c)
-      }
-      case c => error("Unexpected ast kind " + c)
-    }
-  }
-
   // Parser interface
   private def parseSMTLIB2(file: Boolean, str: String) : Z3AST = {
     if(file) {