Remove support for the linux-precise layout tests port.

third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/port/linux.py

 # Copyright (C) 2010 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 21 matching lines @@
 from webkitpy.layout_tests.port import base
 from webkitpy.layout_tests.port import win
 
 
 _log = logging.getLogger(__name__)
 
 
 class LinuxPort(base.Port):
     port_name = 'linux'
 
-    SUPPORTED_VERSIONS = ('precise', 'trusty')
+    SUPPORTED_VERSIONS = ('trusty',)
 
     FALLBACK_PATHS = {}
     FALLBACK_PATHS['trusty'] = ['linux'] + win.WinPort.latest_platform_fallback_path()
-    FALLBACK_PATHS['precise'] = ['linux-precise'] + FALLBACK_PATHS['trusty']
 
     DEFAULT_BUILD_DIRECTORIES = ('out',)
 
     BUILD_REQUIREMENTS_URL = 'https://chromium.googlesource.com/chromium/src/+/master/docs/linux_build_instructions.md'
 
     @classmethod
     def determine_full_port_name(cls, host, options, port_name):
         if port_name.endswith('linux'):
             assert host.platform.is_linux()
             version = host.platform.os_version
@@ skipping 93 matching lines @@
             _log.error('    Please install using: "sudo apt-get install apache2 libapache2-mod-php5"')
             _log.error('')
         return result
 
     def _wdiff_missing_message(self):
         return 'wdiff is not installed; please install using "sudo apt-get install wdiff"'
 
     def _path_to_driver(self, target=None):
         binary_name = self.driver_name()
         return self._build_path_with_target(target, binary_name)