remove no-op Avocado suppressions (Azure#24703)

Author: Konrad Jamrozik

dev/cognitiveservices/data-plane/Language/readme.md

@@ -46,11 +46,3 @@ swagger-to-sdk:
   - repo: azure-sdk-for-net-track2
   - repo: azure-sdk-for-python
 ```
-
-## Suppression
-
-``` yaml
-directive:
-  - suppress: MISSING_APIS_IN_DEFAULT_TAG
-    reason: Not every service will ship new versions within the Language pillar.
-```

specification/cognitiveservices/data-plane/Language/readme.md

@@ -205,11 +205,3 @@ This is not used by Autorest itself.
 swagger-to-sdk:
   - repo: azure-sdk-for-net-track2
 ```
-
-## Suppression
-
-``` yaml
-directive:
-  - suppress: MISSING_APIS_IN_DEFAULT_TAG
-    reason: Not every service will ship new versions within the Language pillar.
-```