Change Go test case to compile with current compiler.

Recent changes caused this to give an error about an unused variable.

Examples/test-suite/go/contract_runme.go

@@ -196,13 +196,13 @@ func main() {
 	}()
 
 	//Namespace
-	my := contract.NewMyClass(1)
+	contract.NewMyClass(1)
 	func() {
 		defer func() {
 			if recover() == nil {
 				panic("Failed! constructor preassertion")
 			}
 		}()
-		my = contract.NewMyClass(0)
+		contract.NewMyClass(0)
 	}()
 }