ref: remove dead code in models.eventattachment (#72799)

this fixes type checking in this module when BaseManager becomes checked

<!-- Describe your PR here. -->

src/sentry/models/eventattachment.py

@@ -7,7 +7,6 @@
 from typing import IO, Any
 
 import zstandard
-from django.conf import settings
 from django.core.cache import cache
 from django.core.exceptions import ObjectDoesNotExist
 from django.db import models
@@ -169,7 +168,7 @@ def getfile(self) -> IO[bytes]:
 
     @classmethod
     def putfile(cls, project_id: int, attachment: CachedAttachment) -> PutfileResult:
-        from sentry.models.files import File, FileBlob
+        from sentry.models.files import FileBlob
 
         content_type = normalize_content_type(attachment.content_type, attachment.name)
         data = attachment.data
@@ -179,34 +178,19 @@ def putfile(cls, project_id: int, attachment: CachedAttachment) -> PutfileResult
 
         blob = BytesIO(data)
 
-        # NOTE: we still keep the old code around for a while before complete removing it
-        store_blobs = True
+        size, checksum = get_size_and_checksum(blob)
 
-        if store_blobs:
-            size, checksum = get_size_and_checksum(blob)
-
-            if can_store_inline(data) and in_random_rollout("eventattachments.store-small-inline"):
-                blob_path = ":" + data.decode()
-            else:
-                blob_path = "eventattachments/v1/" + FileBlob.generate_unique_path()
-
-                storage = get_storage()
-                compressed_blob = BytesIO(zstandard.compress(data))
-                storage.save(blob_path, compressed_blob)
-
-            return PutfileResult(
-                content_type=content_type, size=size, sha1=checksum, blob_path=blob_path
-            )
+        if can_store_inline(data) and in_random_rollout("eventattachments.store-small-inline"):
+            blob_path = ":" + data.decode()
+        else:
+            blob_path = "eventattachments/v1/" + FileBlob.generate_unique_path()
 
-        file = File.objects.create(
-            name=attachment.name,
-            type=attachment.type,
-            headers={"Content-Type": content_type},
-        )
-        file.putfile(blob, blob_size=settings.SENTRY_ATTACHMENT_BLOB_SIZE)
+            storage = get_storage()
+            compressed_blob = BytesIO(zstandard.compress(data))
+            storage.save(blob_path, compressed_blob)
 
         return PutfileResult(
-            content_type=content_type, size=file.size, sha1=file.checksum, file_id=file.id
+            content_type=content_type, size=size, sha1=checksum, blob_path=blob_path
         )