[py] Delete PhantomJS capabilities

Cr-Mirrored-From: https://chromium.googlesource.com/external/github.com/SeleniumHQ/selenium
Cr-Mirrored-Commit: 8959a2872b4ae19163aa1c9cd78dbc238763500b
diff --git a/selenium/webdriver/common/desired_capabilities.py b/selenium/webdriver/common/desired_capabilities.py
index 258e78e..c3a6171 100644
--- a/selenium/webdriver/common/desired_capabilities.py
+++ b/selenium/webdriver/common/desired_capabilities.py
@@ -107,13 +107,6 @@
         "platform": "MAC",
     }
 
-    PHANTOMJS = {
-        "browserName": "phantomjs",
-        "version": "",
-        "platform": "ANY",
-        "javascriptEnabled": True,
-    }
-
     WEBKITGTK = {
         "browserName": "MiniBrowser",
         "version": "",