Revert rake db:create and db:drop to defaults

This makes them aware of RACK_ENV again since we're using that now.

Rakefile

@@ -2,20 +2,6 @@ require 'rake'
 require "sinatra/activerecord/rake"
 require ::File.expand_path('../config/environment', __FILE__)
 
-Rake::Task["db:create"].clear
-Rake::Task["db:drop"].clear
-
-# NOTE: Assumes SQLite3 DB
-desc "create the database"
-task "db:create" do
-  touch 'db/db.sqlite3'
-end
-
-desc "drop the database"
-task "db:drop" do
-  rm_f 'db/db.sqlite3'
-end
-
 desc 'Retrieves the current schema version number'
 task "db:version" do
   puts "Current version: #{ActiveRecord::Migrator.current_version}"