removing the part about .gitpod.Dockerfile

When run with 83f4e37 , Gitpod gave this ```headless task failed``` error: ![Screenshot from 2022-02-21 22-05-31](https://user-images.githubusercontent.com/465923/155026499-e59b8e9e-220d-4915-ac68-33b8bef711c2.png)
WDscholia · Mar 8, 2022 · d842204 · d842204
1 parent 5e786eb
commit d842204
Showing 1 changed file with 0 additions and 3 deletions.
diff --git a/.gitpod.yml b/.gitpod.yml
@@ -1,6 +1,3 @@
-image:
-  file: .gitpod.Dockerfile
-
 ports:
 - port: 8100
   onOpen: open-preview