acc: remove terraform/ test (#3405)

Proved not useful.

Author: denik

acceptance/terraform/main.tf

@@ -19,6 +19,3 @@ How to regenerate Go structs from an updated terraform provider?
 2. Delete `./tmp` if it exists
 3. Run `go run .`
 4. Run `gofmt -s -w ../schema`
-5. Go back to the root of the repo.
-6. Update `/acceptance/terraform/main.tf` file to use new version of TF provider
-7. Run `go test ./acceptance -v -update -run TestAccept/terraform` to update test output with a new version of TF provider