revert tests/assets/tokenizer vlm changes

Author: lkhphuc

tests/assets/tokenizer/tokenizer.json

@@ -2029,10 +2029,7 @@
       "land": 1994,
       "?\n": 1995,
       " respect": 1996,
-      "ances": 1997,
-      "<|image|>": 1998,
-      "<|begin_of_image|>": 1999,
-      "<|end_of_image|>": 2000
+      "ances": 1997
     },
     "merges": [
     ]

tests/assets/tokenizer/tokenizer_config.json

@@ -15,30 +15,6 @@
       "rstrip": false,
       "single_word": false,
       "special": true
-    },
-    "1998": {
-      "content": "<|image|>",
-      "lstrip": false,
-      "normalized": false,
-      "rstrip": false,
-      "single_word": false,
-      "special": true
-    },
-    "1999": {
-      "content": "<|begin_of_image|>",
-      "lstrip": false,
-      "normalized": false,
-      "rstrip": false,
-      "single_word": false,
-      "special": true
-    },
-    "2000": {
-      "content": "<|end_of_image|>",
-      "lstrip": false,
-      "normalized": false,
-      "rstrip": false,
-      "single_word": false,
-      "special": true
     }
   },
   "bos_token": "<|begin_of_text|>",