automation: delete code related to Python 2.7 support

automation: delete code related to Python 2.7 support

The building of Inno and WiX installers took a python_version argument
that allowed us to specify "2" or "3" for the major Python version. Since
we no longer support Python 2, we can delete this argument and everything
feeding into it.

Differential Revision: https://phab.mercurial-scm.org/D12264

--- a/contrib/automation/hgautomation/cli.py	Sat Feb 19 18:42:31 2022 -0700
+++ b/contrib/automation/hgautomation/cli.py	Sat Feb 19 18:42:12 2022 -0700
@@ -65,7 +65,6 @@
 def build_inno(
     hga: HGAutomation,
     aws_region,
-    python_version,
     arch,
     revision,
     version,
@@ -80,21 +79,18 @@
 
         windows.synchronize_hg(SOURCE_ROOT, revision, instance)
 
-        for py_version in python_version:
-            for a in arch:
-                windows.build_inno_installer(
-                    instance.winrm_client,
-                    py_version,
-                    a,
-                    DIST_PATH,
-                    version=version,
-                )
+        for a in arch:
+            windows.build_inno_installer(
+                instance.winrm_client,
+                a,
+                DIST_PATH,
+                version=version,
+            )
 
 
 def build_wix(
     hga: HGAutomation,
     aws_region,
-    python_version,
     arch,
     revision,
     version,
@@ -109,15 +105,13 @@
 
         windows.synchronize_hg(SOURCE_ROOT, revision, instance)
 
-        for py_version in python_version:
-            for a in arch:
-                windows.build_wix_installer(
-                    instance.winrm_client,
-                    py_version,
-                    a,
-                    DIST_PATH,
-                    version=version,
-                )
+        for a in arch:
+            windows.build_wix_installer(
+                instance.winrm_client,
+                a,
+                DIST_PATH,
+                version=version,
+            )
 
 
 def build_windows_wheel(
@@ -168,15 +162,14 @@
                     dest_path=DIST_PATH,
                 )
 
-        for py_version in (2, 3):
-            for arch in ('x86', 'x64'):
-                windows.purge_hg(winrm_client)
-                windows.build_inno_installer(
-                    winrm_client, py_version, arch, DIST_PATH, version=version
-                )
-                windows.build_wix_installer(
-                    winrm_client, py_version, arch, DIST_PATH, version=version
-                )
+        for arch in ('x86', 'x64'):
+            windows.purge_hg(winrm_client)
+            windows.build_inno_installer(
+                winrm_client, arch, DIST_PATH, version=version
+            )
+            windows.build_wix_installer(
+                winrm_client, arch, DIST_PATH, version=version
+            )
 
 
 def terminate_ec2_instances(hga: HGAutomation, aws_region):
@@ -340,14 +333,6 @@
         help='Build Inno Setup installer(s)',
     )
     sp.add_argument(
-        '--python-version',
-        help='Which version of Python to target',
-        choices={3},
-        type=int,
-        nargs='*',
-        default=[3],
-    )
-    sp.add_argument(
         '--arch',
         help='Architecture to build for',
         choices={'x86', 'x64'},
@@ -402,14 +387,6 @@
 
     sp = subparsers.add_parser('build-wix', help='Build WiX installer(s)')
     sp.add_argument(
-        '--python-version',
-        help='Which version of Python to target',
-        choices={3},
-        type=int,
-        nargs='*',
-        default=[3],
-    )
-    sp.add_argument(
         '--arch',
         help='Architecture to build for',
         choices={'x86', 'x64'},

--- a/contrib/automation/hgautomation/windows.py	Sat Feb 19 18:42:31 2022 -0700
+++ b/contrib/automation/hgautomation/windows.py	Sat Feb 19 18:42:12 2022 -0700
@@ -264,7 +264,6 @@
 
 def build_inno_installer(
     winrm_client,
-    python_version: int,
     arch: str,
     dest_path: pathlib.Path,
     version=None,
@@ -274,10 +273,7 @@
     Using a WinRM client, remote commands are executed to build
     a Mercurial Inno Setup installer.
     """
-    print(
-        'building Inno Setup installer for Python %d %s'
-        % (python_version, arch)
-    )
+    print('building Inno Setup installer for %s' % arch)
 
     # TODO fix this limitation in packaging code
     if not version:
@@ -319,7 +315,6 @@
 
 def build_wix_installer(
     winrm_client,
-    python_version: int,
     arch: str,
     dest_path: pathlib.Path,
     version=None,
@@ -328,7 +323,7 @@
 
     Using a WinRM client, remote commands are executed to build a WiX installer.
     """
-    print('Building WiX installer for Python %d %s' % (python_version, arch))
+    print('Building WiX installer for %s' % arch)
 
     # TODO fix this limitation in packaging code
     if not version: