Treat win8 machines as win10 ports and remove baseline/specifier support.

Tools/Scripts/webkitpy/layout_tests/port/builders.py

Index: Tools/Scripts/webkitpy/layout_tests/port/builders.py
diff --git a/Tools/Scripts/webkitpy/layout_tests/port/builders.py b/Tools/Scripts/webkitpy/layout_tests/port/builders.py
index 3d824c946336f26e6277c584c37f7e1368da7f75..8c519ff293bc81b2a5e642bd375b7846408b257b 100644
--- a/Tools/Scripts/webkitpy/layout_tests/port/builders.py
+++ b/Tools/Scripts/webkitpy/layout_tests/port/builders.py
@@ -44,7 +44,6 @@ _exact_matches = {
     "WebKit XP": {"port_name": "win-xp", "specifiers": ['XP', 'Release']},
     "WebKit Win7": {"port_name": "win-win7", "specifiers": ['Win7', 'Release']},
     "WebKit Win7 (dbg)": {"port_name": "win-win7", "specifiers": ['Win7', 'Debug']},
-    "WebKit Win8": {"port_name": "win-win8", "specifiers": ['Win8', 'Release']},
     "WebKit Win10": {"port_name": "win-win10", "specifiers": ['Win10', 'Release']},
     # FIXME: Rename this to 'WebKit Linux Precise'
     "WebKit Linux": {"port_name": "linux-precise", "specifiers": ['Precise', 'Release']},
@@ -70,7 +69,6 @@ _deps_builders = {
     "linux-trusty": "WebKit Linux (deps)",
     "win-xp": "WebKit XP (deps)",
     "win-win7": "WebKit XP (deps)",
-    "win-win8": "WebKit XP (deps)",
     "win-win10": "WebKit XP (deps)",
     "mac-snowleopard": "WebKit Mac10.6 (deps)",
     # The following port names are mapped to 10.6 bot since we don't have bots