Remove support for installing the swift modules in a toolchain

We haven’t been installing the modules into the toolchain since late 2019, there’s no need to have an option for it.

Author: ahoppen

build-script.py

@@ -605,7 +605,7 @@ def check_and_sync(file_path, install_path):
         fatal_error("install failed with exit status %d" % (result,))
 
 
-def install(build_dir, dylib_dir, swiftmodule_base_name, stdlib_rpath):
+def install(build_dir, dylib_dir, stdlib_rpath):
     for dylib_name in get_installed_dylib_names():
 
         dylib_path = os.path.join(build_dir, dylib_name)
@@ -619,15 +619,6 @@ def install(build_dir, dylib_dir, swiftmodule_base_name, stdlib_rpath):
             file_path=dylib_path, install_path=os.path.join(dylib_dir, dylib_name)
         )
 
-    # Optionally install .swiftmodule
-    if swiftmodule_base_name:
-        module_path = os.path.join(build_dir, "SwiftSyntax.swiftmodule")
-        doc_path = os.path.join(build_dir, "SwiftSyntax.swiftdoc")
-        module_dest = swiftmodule_base_name + ".swiftmodule"
-        doc_dest = swiftmodule_base_name + ".swiftdoc"
-        check_and_sync(file_path=module_path, install_path=module_dest)
-        check_and_sync(file_path=doc_path, install_path=doc_dest)
-
 
 # -----------------------------------------------------------------------------
 # Arugment Parsing
@@ -652,17 +643,6 @@ def install(build_dir, dylib_dir, swiftmodule_base_name, stdlib_rpath):
 """
 
 
-_SWIFTMODULE_BASE_NAME_HELP = """
-The name under which the Swift module should be installed. A .swiftdoc and
-.swiftmodule file extension will be added to this path and the corresponding
-files will be copied there.
-
-Example /path/to/SwiftSyntax.swiftmodule/x86_64 copies files to
-/path/to/SwiftSyntax.swiftmodule/x86_64.swiftmodule and
-/path/to/SwiftSyntax.swiftmodule/x86_64.swiftdoc
-"""
-
-
 def parse_args():
     parser = argparse.ArgumentParser(
         formatter_class=argparse.RawDescriptionHelpFormatter, description=_DESCRIPTION
@@ -807,7 +787,6 @@ def main():
         install(
             build_dir=build_dir,
             dylib_dir=args.dylib_dir,
-            swiftmodule_base_name=args.swiftmodule_base_name,
             stdlib_rpath=stdlib_rpath,
         )
         sys.exit(0)