Revert "Use Thread ContextClassLoader in ConfigurableObjectInputStream"

This reverts commit 6e40e5. The fix for SWF-1690 now targets 2.5 only.

spring-webflow/src/main/java/org/springframework/webflow/execution/repository/snapshot/SerializedFlowExecutionSnapshot.java

@@ -248,12 +248,7 @@ private static class ConfigurableObjectInputStream extends ObjectInputStream {
 
 		public ConfigurableObjectInputStream(InputStream in, ClassLoader classLoader) throws IOException {
 			super(in);
-			this.classLoader = initClassLoader(classLoader);
-		}
-
-		private static ClassLoader initClassLoader(ClassLoader defaultClassLoader) {
-			ClassLoader result = Thread.currentThread().getContextClassLoader();
-			return result != null ? result : defaultClassLoader;
+			this.classLoader = classLoader;
 		}
 
 		protected Class<?> resolveClass(ObjectStreamClass desc) throws IOException, ClassNotFoundException {