Update delete.txt

Author: sophstad

source/server/delete.txt

@@ -48,9 +48,9 @@
 
      For method reference:
 
-     - :mongodb:method:`db.collection.remove`
+     - :method:`db.collection.remove`
 
-     - :mongodb:method:`db.collection.deleteOne`
+     - :method:`db.collection.deleteOne`
 
-     - :mongodb:method:`db.collection.deleteMany`
+     - :method:`db.collection.deleteMany`