[3party] Update protobuf to v4.23.4

Signed-off-by: Andrew Shkrob <andrew.shkrob.social@yandex.by>

README

@@ -1 +0,0 @@
-Kothic Mapcss parser/processor tailored for Organic Maps use.

README.md

@@ -0,0 +1,9 @@
+Kothic Mapcss parser/processor tailored for Organic Maps use.
+
+Dependencies:
+* Python >= 3.8
+      
+Python dependencies:
+```bash
+pip3 install -r requirements.txt
+```

requirements.txt

@@ -0,0 +1 @@
+protobuf~=4.23.0

src/libkomwm.py

@@ -2,12 +2,12 @@ from mapcss import MapCSS
 from optparse import OptionParser
 import os
 import csv
-import sys
 import functools
 from itertools import chain
 from multiprocessing import Pool, set_start_method
 from collections import OrderedDict
 import mapcss.webcolors
+from drules_struct_pb2 import *
 
 whatever_to_hex = mapcss.webcolors.webcolors.whatever_to_hex
 whatever_to_cairo = mapcss.webcolors.webcolors.whatever_to_cairo
@@ -15,17 +15,6 @@ whatever_to_cairo = mapcss.webcolors.webcolors.whatever_to_cairo
 PROFILE = False
 MULTIPROCESSING = True
 
-# If path to the protobuf EGG is specified then apply it before import drules_struct_pb2
-PROTOBUF_EGG_PATH = os.environ.get("PROTOBUF_EGG_PATH")
-if PROTOBUF_EGG_PATH:
-    # another version of protobuf may be installed, override it
-    for i in range(len(sys.path)):
-        if -1 != sys.path[i].find("protobuf-"):
-            sys.path[i] = PROTOBUF_EGG_PATH
-    sys.path.append(PROTOBUF_EGG_PATH)
-
-from drules_struct_pb2 import *
-
 WIDTH_SCALE = 1.0
 
 # Priority values defined in *.prio.txt files are adjusted