diff --git a/telethon/extensions/__init__.py b/telethon/extensions/__init__.py
index 9e7f6686..903460b6 100644
--- a/telethon/extensions/__init__.py
+++ b/telethon/extensions/__init__.py
@@ -4,4 +4,3 @@ communication with support for cancelling the operation, and an utility class
 to read arbitrary binary data in a more comfortable way, with int/strings/etc.
 """
 from .binaryreader import BinaryReader
-from .tcpclient import TcpClient
diff --git a/telethon/extensions/tcpclient.py b/telethon/extensions/tcpclient.py
deleted file mode 100644
index 4baa46ca..00000000
--- a/telethon/extensions/tcpclient.py
+++ /dev/null
@@ -1,171 +0,0 @@
-"""
-This module holds a rough implementation of the C# TCP client.
-
-This class is **not** safe across several tasks since partial reads
-may be ``await``'ed before being able to return the exact byte count.
-
-This class is also not concerned about disconnections or retries of
-any sort, nor any other kind of errors such as connecting twice.
-"""
-import asyncio
-import errno
-import logging
-import socket
-import ssl
-
-CONN_RESET_ERRNOS = {
-    errno.EBADF, errno.ENOTSOCK, errno.ENETUNREACH,
-    errno.EINVAL, errno.ENOTCONN, errno.EHOSTUNREACH,
-    errno.ECONNREFUSED, errno.ECONNRESET, errno.ECONNABORTED,
-    errno.ENETDOWN, errno.ENETRESET, errno.ECONNABORTED,
-    errno.EHOSTDOWN, errno.EPIPE, errno.ESHUTDOWN
-}
-# catched: EHOSTUNREACH, ECONNREFUSED, ECONNRESET, ENETUNREACH
-# ConnectionError: EPIPE, ESHUTDOWN, ECONNABORTED, ECONNREFUSED, ECONNRESET
-
-try:
-    import socks
-except ImportError:
-    socks = None
-
-SSL_PORT = 443
-__log__ = logging.getLogger(__name__)
-
-
-class TcpClient:
-    """A simple TCP client to ease the work with sockets and proxies."""
-
-    class SocketClosed(ConnectionError):
-        pass
-
-    def __init__(self, *, loop, timeout, ssl=None, proxy=None):
-        """
-        Initializes the TCP client.
-
-        :param proxy: the proxy to be used, if any.
-        :param timeout: the timeout for connect, read and write operations.
-        :param ssl: ssl.wrap_socket keyword arguments to use when connecting
-                    if port == SSL_PORT, or do nothing if not present.
-        """
-        self._loop = loop
-        self.proxy = proxy
-        self.ssl = ssl
-        self._socket = None
-        self._reader = None
-        self._writer = None
-        self._closed = asyncio.Event(loop=self._loop)
-        self._closed.set()
-
-        if isinstance(timeout, (int, float)):
-            self.timeout = float(timeout)
-        elif hasattr(timeout, 'seconds'):
-            self.timeout = float(timeout.seconds)
-        else:
-            raise TypeError('Invalid timeout type: {}'.format(type(timeout)))
-
-    @staticmethod
-    def _create_socket(mode, proxy):
-        if proxy is None:
-            s = socket.socket(mode, socket.SOCK_STREAM)
-        else:
-            __log__.info('Connection will be made through proxy %s', proxy)
-            import socks
-            s = socks.socksocket(mode, socket.SOCK_STREAM)
-            if isinstance(proxy, dict):
-                s.set_proxy(**proxy)
-            else:  # tuple, list, etc.
-                s.set_proxy(*proxy)
-        s.setblocking(False)
-        return s
-
-    async def connect(self, ip, port):
-        """
-        Tries connecting to IP:port unless an OSError is raised.
-
-        :param ip: the IP to connect to.
-        :param port: the port to connect to.
-        """
-        if ':' in ip:  # IPv6
-            ip = ip.replace('[', '').replace(']', '')
-            mode, address = socket.AF_INET6, (ip, port, 0, 0)
-        else:
-            mode, address = socket.AF_INET, (ip, port)
-
-        try:
-            if self._socket is None:
-                self._socket = self._create_socket(mode, self.proxy)
-                wrap_ssl = self.ssl and port == SSL_PORT
-            else:
-                wrap_ssl = False
-
-            await asyncio.wait_for(
-                self._loop.sock_connect(self._socket, address),
-                timeout=self.timeout,
-                loop=self._loop
-            )
-            if wrap_ssl:
-                # Temporarily set the socket to blocking
-                # (timeout) until connection is established.
-                self._socket.settimeout(self.timeout)
-                self._socket = ssl.wrap_socket(
-                    self._socket, do_handshake_on_connect=True, **self.ssl)
-                self._socket.setblocking(False)
-
-            self._closed.clear()
-            self._reader, self._writer =\
-                await asyncio.open_connection(sock=self._socket)
-        except OSError as e:
-            if e.errno in CONN_RESET_ERRNOS:
-                raise ConnectionResetError() from e
-            else:
-                raise
-
-    @property
-    def is_connected(self):
-        """Determines whether the client is connected or not."""
-        return not self._closed.is_set()
-
-    def close(self):
-        """Closes the connection."""
-        fd = None
-        try:
-            if self._writer is not None:
-                self._writer.close()
-
-            if self._socket is not None:
-                fd = self._socket.fileno()
-                if self.is_connected:
-                    self._socket.shutdown(socket.SHUT_RDWR)
-                self._socket.close()
-        except OSError:
-            pass  # Ignore ENOTCONN, EBADF, and any other error when closing
-        finally:
-            self._socket = None
-            self._reader = None
-            self._writer = None
-            self._closed.set()
-            if fd and fd != -1:
-                self._loop.remove_reader(fd)
-
-    async def write(self, data):
-        """
-        Writes (sends) the specified bytes to the connected peer.
-        :param data: the data to send.
-        """
-        if not self.is_connected:
-            raise ConnectionResetError('Not connected')
-
-        self._writer.write(data)
-        await self._writer.drain()
-
-    async def read(self, size):
-        """
-        Reads (receives) a whole block of size bytes from the connected peer.
-
-        :param size: the size of the block to be read.
-        :return: the read data with len(data) == size.
-        """
-        if not self.is_connected:
-            raise ConnectionResetError('Not connected')
-
-        return await self._reader.readexactly(size)