bots: Move "EmbeddedBotHandler" class to "zerver/lib/bot_lib.py" file.

This would keep embedded classes for zulip at one place, that is, in
"zerver" directory. This also fixes break in PyPI package for bindings.

bots_api/bot_lib.py

@@ -6,8 +6,6 @@ import signal
 import sys
 import time
 import re
-from zerver.lib.actions import internal_send_message
-from zerver.models import UserProfile
 
 from six.moves import configparser
 
@@ -111,43 +109,6 @@ class ExternalBotHandler(object):
         config.readfp(open(conf_file_path))  # type: ignore
         return dict(config.items(section))
 
-class EmbeddedBotHandler(object):
-    def __init__(self, user_profile):
-        # type: (UserProfile) -> None
-        # Only expose a subset of our UserProfile's functionality
-        self.user_profile = user_profile
-        self._rate_limit = RateLimit(20, 5)
-        try:
-            self.full_name = user_profile['full_name']
-            self.email = user_profile['email']
-        except KeyError:
-            logging.error('Cannot fetch user profile, make sure you have set'
-                          ' up the zuliprc file correctly.')
-            sys.exit(1)
-
-    def send_message(self, message):
-        # type: (Dict[str, Any]) -> None
-        if self._rate_limit.is_legal():
-            internal_send_message(realm=self.user_profile.realm, sender_email=message['sender'],
-                                  recipient_type_name=message['type'], recipients=message['to'],
-                                  subject=message['subject'], content=message['content'])
-        else:
-            self._rate_limit.show_error_and_exit()
-
-    def send_reply(self, message, response):
-        # type: (Dict[str, Any], str) -> None
-        send_reply(message, response, self.email, self.send_message)
-
-    def get_config_info(self, bot_name, section=None):
-        # type: (str, Optional[str]) -> Dict[str, Any]
-        conf_file_path = os.path.realpath(os.path.join(
-            our_dir, '..', 'bots', bot_name, bot_name + '.conf'))
-        section = section or bot_name
-        config = configparser.ConfigParser()
-        config.readfp(open(conf_file_path))  # type: ignore
-        return dict(config.items(section))
-
-
 class StateHandler(object):
     def __init__(self):
         # type: () -> None