Revert "Work around Groovy compiler bug that can name classes incorrectly"

This reverts commit 46fc5c05.

Closes #598

spring-boot-cli/src/main/java/org/springframework/boot/cli/compiler/GroovyCompiler.java

@@ -20,7 +20,6 @@ import groovy.lang.GroovyClassLoader;
 import groovy.lang.GroovyClassLoader.ClassCollector;
 import groovy.lang.GroovyCodeSource;
 
-import java.io.File;
 import java.io.IOException;
 import java.lang.reflect.Field;
 import java.net.URL;
@@ -182,13 +181,7 @@ public class GroovyCompiler {
 		for (String source : sources) {
 			List<String> paths = ResourceUtils.getUrls(source, this.loader);
 			for (String path : paths) {
-				URL url = new URL(path);
-				if ("file".equals(url.getProtocol())) {
-					compilationUnit.addSource(new File(url.getFile()));
-				}
-				else {
-					compilationUnit.addSource(url);
-				}
+				compilationUnit.addSource(new URL(path));
 			}
 		}