clear rolled back package files

Author: geof90

CodePushPackage.m

@@ -475,11 +475,22 @@ + (void)rollbackPackage
 {
     NSError *error;
     NSMutableDictionary *info = [self getCurrentPackageInfo:&error];
+    if (error) {
+        return;
+    }
 
+    NSString *currentPackageFolderPath = [self getCurrentPackageFolderPath:&error];
     if (error) {
         return;
     }
 
+    NSError *deleteError;
+    [[NSFileManager defaultManager] removeItemAtPath:currentPackageFolderPath
+                                               error:&deleteError];
+    if (deleteError) {
+        NSLog(@"Error deleting current package contents at %@", currentPackageFolderPath);
+    }
+    
     [info setValue:info[@"previousPackage"] forKey:@"currentPackage"];
     [info removeObjectForKey:@"previousPackage"];
 

android/app/src/main/java/com/microsoft/codepush/react/CodePushPackage.java

@@ -187,6 +187,8 @@ public void installPackage(ReadableMap updatePackage) throws IOException {
 
     public void rollbackPackage() throws IOException {
         WritableMap info = getCurrentPackageInfo();
+        String currentPackageFolderPath = getCurrentPackageFolderPath();
+        CodePushUtils.deleteDirectoryAtPath(currentPackageFolderPath);
         info.putString(CURRENT_PACKAGE_KEY, CodePushUtils.tryGetString(info, PREVIOUS_PACKAGE_KEY));
         info.putNull(PREVIOUS_PACKAGE_KEY);
         updateCurrentPackageInfo(info);