Remove support for legacy wpr_server in Telemetry

telemetry/telemetry/internal/platform/network_controller_backend.py

Index: telemetry/telemetry/internal/platform/network_controller_backend.py
diff --git a/telemetry/telemetry/internal/platform/network_controller_backend.py b/telemetry/telemetry/internal/platform/network_controller_backend.py
index c67d5e7223ce67c852df333ab2edf3b5cdab1cdb..8eb0798b73b778f8ce1ff8fdd6d50877def5f84c 100644
--- a/telemetry/telemetry/internal/platform/network_controller_backend.py
+++ b/telemetry/telemetry/internal/platform/network_controller_backend.py
@@ -4,7 +4,6 @@
 
 import os
 
-from telemetry.internal.util import wpr_server
 from telemetry.internal.util import webpagereplay_go_server
 from telemetry.internal.util import ts_proxy_server
 from telemetry.util import wpr_modes
@@ -31,7 +30,6 @@ class NetworkControllerBackend(object):
     self._platform_backend = platform_backend
     self._wpr_mode = None
     self._extra_wpr_args = None
-    self._use_wpr_go = False
     self._archive_path = None
     self._make_javascript_deterministic = None
     self._forwarder = None
@@ -77,7 +75,7 @@ class NetworkControllerBackend(object):
     except AttributeError:
       return None
 
-  def Open(self, wpr_mode, extra_wpr_args, use_wpr_go=False):
+  def Open(self, wpr_mode, extra_wpr_args):
     """Configure and prepare target platform for network control.
 
     This may, e.g., install test certificates and perform any needed setup
@@ -94,7 +92,6 @@ class NetworkControllerBackend(object):
     assert not self.is_open, 'Network controller is already open'
     self._wpr_mode = wpr_mode
     self._extra_wpr_args = extra_wpr_args
-    self._use_wpr_go = use_wpr_go
 
   def Close(self):
     """Undo changes in the target platform used for network control.
@@ -107,7 +104,6 @@ class NetworkControllerBackend(object):
     self._make_javascript_deterministic = None
     self._archive_path = None
     self._extra_wpr_args = None
-    self._use_wpr_go = False
     self._wpr_mode = None
 
   def StartReplay(self, archive_path, make_javascript_deterministic=False):
@@ -177,21 +173,12 @@ class NetworkControllerBackend(object):
   def _StartReplayServer(self):
     """Start the replay server and return the started local_ports."""
     self._StopReplayServer()  # In case it was already running.
-    if self._use_wpr_go:
-      self._wpr_server = webpagereplay_go_server.ReplayServer(
-          self._archive_path,
-          self.host_ip,
-          http_port=0,
-          https_port=0,
-          replay_options=self._ReplayCommandLineArgs())
-    else:
-      self._wpr_server = wpr_server.ReplayServer(
-          self._archive_path,
-          self.host_ip,
-          http_port=0,
-          https_port=0,
-          dns_port=None,
-          replay_options=self._ReplayCommandLineArgs())
+    self._wpr_server = webpagereplay_go_server.ReplayServer(
+        self._archive_path,
+        self.host_ip,
+        http_port=0,
+        https_port=0,
+        replay_options=self._ReplayCommandLineArgs())
     return self._wpr_server.StartServer()
 
   def _StopReplayServer(self):