Remove tiff as a supported image preview format

Fixes #81803

This is not supported by chromium

extensions/image-preview/README.md

@@ -14,5 +14,4 @@ Supported image formats:
 - `*.gif`
 - `*.ico`
 - `*.tga`
-- `*.tif`, `*.tiff`
 - `*.webp`

extensions/image-preview/package.json

@@ -26,7 +26,7 @@
         "displayName": "%webviewEditors.displayName%",
         "selector": [
           {
-            "filenamePattern": "*.{jpg,jpe,jpeg,png,bmp,gif,ico,tga,tif,tiff,webp}",
+            "filenamePattern": "*.{jpg,jpe,jpeg,png,bmp,gif,ico,tga,webp}",
             "mime": "image/*"
           }
         ]