diff --git a/frontend/assets/plugin_scripts/NetworkDoctor.js b/frontend/assets/plugin_scripts/NetworkDoctor.js
deleted file mode 100644
index 7c07733..0000000
--- a/frontend/assets/plugin_scripts/NetworkDoctor.js
+++ /dev/null
@@ -1,66 +0,0 @@
-function NetworkDoctor(serverFps, clientUpsyncFps) {
-  this.serverFps = serverFps;
-  this.clientUpsyncFps = clientUpsyncFps;
-  this.millisPerServerFrame = parseInt(1000 / this.serverFps);
-  this._tooLongSinceLastFrameDiffReceivedThreshold = (this.millisPerServerFrame << 6);
-
-  this.setupFps = function(fps) {
-    this.serverFps = this.clientUpsyncFps = fps;
-    this.millisPerServerFrame = parseInt(1000 / this.serverFps);
-    this._tooLongSinceLastFrameDiffReceivedThreshold = (this.millisPerServerFrame << 6);
-  }
-
-  this._lastFrameDiffRecvTime = null;
-  this._tooLongSinceLastFrameDiffReceived = function() {
-    if (undefined === this._lastFrameDiffRecvTime || null === this._lastFrameDiffRecvTime) return false;
-    return (this._tooLongSinceLastFrameDiffReceivedThreshold <= (Date.now() - this._lastFrameDiffRecvTime));
-  };
-
-  this._consecutiveALittleLongFrameDiffReceivedIntervalCount = 0;
-  this._consecutiveALittleLongFrameDiffReceivedIntervalCountThreshold = 120;
-
-  this.onNewFrameDiffReceived = function(frameDiff) {
-    var now = Date.now();
-    if (undefined !== this._lastFrameDiffRecvTime && null !== this._lastFrameDiffRecvTime) {
-      var intervalFromLastFrameDiff = (now - this._lastFrameDiffRecvTime);
-      if ((this.millisPerServerFrame << 5) < intervalFromLastFrameDiff) {
-        ++this._consecutiveALittleLongFrameDiffReceivedIntervalCount;
-        console.log('Medium delay, intervalFromLastFrameDiff is', intervalFromLastFrameDiff);
-      } else {
-        this._consecutiveALittleLongFrameDiffReceivedIntervalCount = 0;
-      }
-    }
-    this._lastFrameDiffRecvTime = now;
-  };
-
-  this._networkComplaintPrefix = "\nNetwork is not good >_<\n";
-
-  this.generateNetworkComplaint = function(excludeTypeConstantALittleLongFrameDiffReceivedInterval, excludeTypeTooLongSinceLastFrameDiffReceived) {
-    if (this.hasBattleStopped) return null;
-    var shouldComplain = false;
-    var ret = this._networkComplaintPrefix;
-    if (true != excludeTypeConstantALittleLongFrameDiffReceivedInterval && this._consecutiveALittleLongFrameDiffReceivedIntervalCountThreshold <= this._consecutiveALittleLongFrameDiffReceivedIntervalCount) {
-      this._consecutiveALittleLongFrameDiffReceivedIntervalCount = 0;
-      ret += "\nConstantly having a little long recv interval.\n";
-      shouldComplain = true;
-    }
-    if (true != excludeTypeTooLongSinceLastFrameDiffReceived && this._tooLongSinceLastFrameDiffReceived()) {
-      ret += "\nToo long since last received frameDiff.\n";
-      shouldComplain = true;
-    }
-    return (shouldComplain ? ret : null);
-  };
-
-  this.hasBattleStopped = false;
-  this.onBattleStopped = function() {
-    this.hasBattleStopped = true;
-  };
-
-  this.isClientSessionConnected = function() {
-    if (!window.game) return false;
-    if (!window.game.clientSession) return false;
-    return window.game.clientSession.connected; 
-  };
-}
-
-window.NetworkDoctor = NetworkDoctor;
diff --git a/frontend/assets/plugin_scripts/NetworkDoctor.js.meta b/frontend/assets/plugin_scripts/NetworkDoctor.js.meta
deleted file mode 100644
index ed88779..0000000
--- a/frontend/assets/plugin_scripts/NetworkDoctor.js.meta
+++ /dev/null
@@ -1,9 +0,0 @@
-{
-  "ver": "1.0.5",
-  "uuid": "477c07c3-0d50-4d55-96f0-6eaf9f25e2da",
-  "isPlugin": false,
-  "loadPluginInWeb": true,
-  "loadPluginInNative": true,
-  "loadPluginInEditor": false,
-  "subMetas": {}
-}
\ No newline at end of file