Revert of e2e928bacd07fead99a18cb08d64cb24e131d3e5

pylib/gyp/generator/xcode.py

Index: pylib/gyp/generator/xcode.py
diff --git a/pylib/gyp/generator/xcode.py b/pylib/gyp/generator/xcode.py
index 588a2ec5a7e7c5f9ba5de758e784fd173a160448..cf44b179fef8db77e55647703b08367fbb0ffdfd 100644
--- a/pylib/gyp/generator/xcode.py
+++ b/pylib/gyp/generator/xcode.py
@@ -590,16 +590,6 @@ def GenerateOutput(target_list, target_dicts, data, params):
   parallel_builds = generator_flags.get('xcode_parallel_builds', True)
   serialize_all_tests = \
       generator_flags.get('xcode_serialize_all_test_runs', True)
-  project_version = generator_flags.get('xcode_project_version', None)
-  upgrade_check_project_version = \
-      generator_flags.get('xcode_upgrade_check_project_version', None)
-
-  # Format upgrade_check_project_version with leading zeros as needed.
-  if upgrade_check_project_version:
-    upgrade_check_project_version = str(upgrade_check_project_version)
-    while len(upgrade_check_project_version) < 4:
-      upgrade_check_project_version = '0' + upgrade_check_project_version
-
   skip_excluded_files = \
       not generator_flags.get('xcode_list_excluded_files', True)
   xcode_projects = {}
@@ -614,20 +604,9 @@ def GenerateOutput(target_list, target_dicts, data, params):
     xcode_projects[build_file] = xcp
     pbxp = xcp.project
 
-    # Set project-level attributes from multiple options
-    project_attributes = {};
     if parallel_builds:
-      project_attributes['BuildIndependentTargetsInParallel'] = 'YES'
-    if upgrade_check_project_version:
-      project_attributes['LastUpgradeCheck'] = upgrade_check_project_version
-      project_attributes['LastTestingUpgradeCheck'] = \
-          upgrade_check_project_version
-      project_attributes['LastSwiftUpdateCheck'] = \
-          upgrade_check_project_version
-    pbxp.SetProperty('attributes', project_attributes)
-
-    if project_version:
-      xcp.project_file.SetXcodeVersion(project_version)
+      pbxp.SetProperty('attributes',
+                       {'BuildIndependentTargetsInParallel': 'YES'})
 
     # Add gyp/gypi files to project
     if not generator_flags.get('standalone'):