v0.21.5 Fix coding oversight for image upload handling

gossamer_forums.rb

@@ -1,5 +1,5 @@
 # gossamer threads migration-import code
-# v0.21.4
+# v0.21.5
 
 require 'mysql2'
 require 'open-uri'
@@ -61,9 +61,9 @@ class GossamerForumsImporter < ImportScripts::Base
     SQL
 
     # ONLY when we need to clear the url_map e.g. if reimporting topics-posts from scratch
-    @db.execute <<-SQL
-      DROP TABLE IF EXISTS url_map;
-    SQL
+#    @db.execute <<-SQL
+#      DROP TABLE IF EXISTS url_map;
+#    SQL
 
     @db.execute <<-SQL
       CREATE TABLE IF NOT EXISTS url_map (