Remove ping pong example

app/ping_pong.json

@@ -1,7 +0,0 @@
- {
-  "name": "ping_pong",
-  "description": "Example host for native messaging",
-  "path": "/path/to/native-messaging/app/ping_pong.py",
-  "type": "stdio",
-  "allowed_extensions": [ "systray-x@Ximi1970" ]
-}

app/ping_pong.py

@@ -1,64 +0,0 @@
-#!/usr/bin/python
-
-import sys
-import json
-import struct
-
-try:
-    # Python 3.x version
-    # Read a message from stdin and decode it.
-    def getMessage():
-        rawLength = sys.stdin.buffer.read(4)
-        if len(rawLength) == 0:
-            sys.exit(0)
-        messageLength = struct.unpack('@I', rawLength)[0]
-        message = sys.stdin.buffer.read(messageLength).decode('utf-8')
-        return json.loads(message)
-
-    # Encode a message for transmission,
-    # given its content.
-    def encodeMessage(messageContent):
-        encodedContent = json.dumps(messageContent).encode('utf-8')
-        encodedLength = struct.pack('@I', len(encodedContent))
-        return {'length': encodedLength, 'content': encodedContent}
-
-    # Send an encoded message to stdout
-    def sendMessage(encodedMessage):
-        sys.stdout.buffer.write(encodedMessage['length'])
-        sys.stdout.buffer.write(encodedMessage['content'])
-        sys.stdout.buffer.flush()
-
-    while True:
-        receivedMessage = getMessage()
-        if receivedMessage == "ping":
-            sendMessage(encodeMessage("pong3"))
-except AttributeError:
-    # Python 2.x version (if sys.stdin.buffer is not defined)
-    # Read a message from stdin and decode it.
-    def getMessage():
-        rawLength = sys.stdin.read(4)
-        if len(rawLength) == 0:
-            sys.exit(0)
-        messageLength = struct.unpack('@I', rawLength)[0]
-        message = sys.stdin.read(messageLength)
-        return json.loads(message)
-
-    # Encode a message for transmission,
-    # given its content.
-    def encodeMessage(messageContent):
-        encodedContent = json.dumps(messageContent)
-        encodedLength = struct.pack('@I', len(encodedContent))
-        return {'length': encodedLength, 'content': encodedContent}
-
-    # Send an encoded message to stdout
-    def sendMessage(encodedMessage):
-        sys.stdout.write(encodedMessage['length'])
-        sys.stdout.write(encodedMessage['content'])
-        sys.stdout.flush()
-
-    while True:
-        sendMessage(encodeMessage("pong2"))
-        receivedMessage = getMessage()
-        if receivedMessage == "ping":
-            sendMessage(encodeMessage("pong2"))
-