Agent: Remove PingScanner from fingerprinter list

The ping scanner is currently required by the monkey agent in order to
determine the OS of the victim. In the future, scanning can be reworked
to be more configurable under a variety of different scenarios. For the
moment, it's not optional.

monkey/infection_monkey/example.conf

@@ -36,7 +36,6 @@
   ],
   "finger_classes": [
     "SSHFinger",
-    "PingScanner",
     "HTTPFinger",
     "SMBFinger",
     "MySQLFinger",

monkey/monkey_island/cc/services/config_schema/definitions/finger_classes.py

@@ -20,13 +20,6 @@ FINGER_CLASSES = {
             "info": "Figures out if SSH is running.",
             "attack_techniques": ["T1210"],
         },
-        {
-            "type": "string",
-            "enum": ["PingScanner"],
-            "title": "Ping Scanner",
-            "safe": True,
-            "info": "Tries to identify if host is alive and which OS it's running by ping scan.",
-        },
         {
             "type": "string",
             "enum": ["HTTPFinger"],

monkey/monkey_island/cc/services/config_schema/internal.py

@@ -165,7 +165,6 @@ INTERNAL = {
                     "default": [
                         "SMBFinger",
                         "SSHFinger",
-                        "PingScanner",
                         "HTTPFinger",
                         "MySQLFinger",
                         "MSSQLFinger",

monkey/tests/data_for_tests/monkey_configs/flat_config.json

@@ -65,7 +65,6 @@
     "finger_classes": [
         "SMBFinger",
         "SSHFinger",
-        "PingScanner",
         "HTTPFinger",
         "MySQLFinger",
         "MSSQLFinger",

monkey/tests/data_for_tests/monkey_configs/monkey_config_standard.json

@@ -100,7 +100,6 @@
         "finger_classes": [
           "SMBFinger",
           "SSHFinger",
-          "PingScanner",
           "HTTPFinger",
           "MySQLFinger",
           "MSSQLFinger",