Update main.swift

Author: ktoso

Samples/JExtractPluginSampleApp/Sources/JExtractPluginSample/main.swift

@@ -12,14 +12,6 @@
 //
 //===----------------------------------------------------------------------===//
 
-import JavaKit
-
-let jvm = try JavaVirtualMachine.shared(classPath: ["QuadraticSieve-1.0.jar"])
-do {
-  let sieveClass = try JavaClass<SieveOfEratosthenes>(environment: jvm.environment())
-  for prime in sieveClass.findPrimes(100)! {
-    print("Found prime: \(prime.intValue())")
-  }
-} catch {
-  print("Failure: \(error)")
+public class MyCoolLibrary {
+  public func exposedToJava() { }
 }