Revert "Add history command (#643)" (#658)

This reverts commit d1118f2cbb.
This commit breaks tab autocompletion.

docs/source/commands/history.rst

@@ -1,2 +0,0 @@
-.. autoprogram:: pwndbg.commands.history:parser
-   :prog: history

pwndbg/__init__.py

@@ -30,7 +30,6 @@ import pwndbg.commands.gdbinit
 import pwndbg.commands.got
 import pwndbg.commands.heap
 import pwndbg.commands.hexdump
-import pwndbg.commands.history
 import pwndbg.commands.ida
 import pwndbg.commands.leakfind
 import pwndbg.commands.misc

pwndbg/commands/__init__.py

@@ -81,8 +81,6 @@ class Command(gdb.Command):
         """Invoke the command with an argument string"""
         try:
             args, kwargs = self.split_args(argument)
-            # skip all None kwargs so we don't have to pass default values twice in argparse and function
-            kwargs = {k: v for k, v in kwargs.items() if v is not None}
         except SystemExit:
             # Raised when the usage is printed by an ArgparsedCommand
             return

pwndbg/commands/history.py

@@ -1,28 +0,0 @@
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-"""
-Display the history.
-"""
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
-
-import argparse
-import readline
-
-import gdb
-
-import pwndbg.commands
-
-parser = argparse.ArgumentParser()
-parser.description = __doc__
-parser.add_argument('count', type=int, nargs='?',
-                    help='The amount of history entries to display')
-@pwndbg.commands.ArgparsedCommand(parser)
-def history(count=10):
-    history_length = readline.get_current_history_length()
-    history = reversed([readline.get_history_item(i) for i in range(history_length)])
-    history = list(history)[:min(count, history_length)]
-    for entry in history:
-        print(entry)