Revert "schema concurrency fix"

This reverts commit 6840b60.

Author: mtrezza

src/Adapters/Storage/Mongo/MongoSchemaCollection.js

@@ -186,45 +186,20 @@ class MongoSchemaCollection {
       .then(() => mongoSchemaToParseSchema(schema))
       .catch(error => {
         if (error.code === 11000) {
-          // Duplicate key error - the schema was likely created by a concurrent operation
-          // Fetch and return the existing schema instead of throwing an error
-          return this._collection
-            .findOne({ _id: schema._id })
-            .then(existingSchema => {
-              if (existingSchema) {
-                return mongoSchemaToParseSchema(existingSchema);
-              }
-              // If we can't find it, throw the original duplicate error
-              throw new Parse.Error(Parse.Error.DUPLICATE_VALUE, 'Class already exists.');
-            });
+          //Mongo's duplicate key error
+          throw new Parse.Error(Parse.Error.DUPLICATE_VALUE, 'Class already exists.');
         } else {
           throw error;
         }
       });
   }
 
   updateSchema(name: string, update) {
-    return this._collection.updateOne(_mongoSchemaQueryFromNameQuery(name), update).catch(error => {
-      // Handle duplicate key errors that can occur during concurrent schema updates
-      if (error.code === 11000) {
-        // Schema already exists/updated by another concurrent operation - safe to ignore
-        return;
-      }
-      throw error;
-    });
+    return this._collection.updateOne(_mongoSchemaQueryFromNameQuery(name), update);
   }
 
   upsertSchema(name: string, query: string, update) {
-    return this._collection
-      .upsertOne(_mongoSchemaQueryFromNameQuery(name, query), update)
-      .catch(error => {
-        // Handle duplicate key errors that can occur during concurrent schema upserts
-        if (error.code === 11000) {
-          // Schema already exists - safe to ignore
-          return;
-        }
-        throw error;
-      });
+    return this._collection.upsertOne(_mongoSchemaQueryFromNameQuery(name, query), update);
   }
 
   // Add a field to the schema. If database does not support the field