remove obsolete test for version without size

changes upstream removed all null crate_size
see also rust-lang/crates.io#9926

Author: jNullj

services/crates/crates-size.tester.js

@@ -10,10 +10,6 @@ t.create('size (with version)')
   .get('/tokio/1.32.0.json')
   .expectBadge({ label: 'size', message: '725 kB' })
 
-t.create('size (with version where version doesnt have size)')
-  .get('/tokio/0.1.6.json')
-  .expectBadge({ label: 'crates.io', message: 'unknown' })
-
 t.create('size (not found)')
   .get('/not-a-crate.json')
   .expectBadge({ label: 'crates.io', message: 'not found' })