chore: Remove all usage of collection.type (#1445)

* chore: Remove all usage of collection.type

* migration: Remove type column

server/test/factories.js

@@ -85,7 +85,6 @@ export async function buildCollection(overrides: Object = {}) {
     name: `Test Collection ${count}`,
     description: "Test collection description",
     creatorId: overrides.userId,
-    type: "atlas",
     ...overrides,
   });
 }

server/test/support.js

@@ -60,7 +60,6 @@ const seed = async () => {
     urlId: "collection",
     teamId: team.id,
     creatorId: user.id,
-    type: "atlas",
   });
 
   const document = await Document.create({