Remove return

build.py

@@ -72,7 +72,7 @@
 ]
 
 
-def cmd(cmd_str: str) -> str:
+def cmd(cmd_str: str):
     """Wraps subprocess.run()."""
     completed_proc = subprocess.run(  # pylint: disable=subprocess-run-check
         cmd_str, shell=True
@@ -84,7 +84,6 @@ def cmd(cmd_str: str) -> str:
             output=completed_proc.stdout,
             stderr=completed_proc.stderr,
         )
-    return completed_proc.stdout.decode("utf-8")
 
 
 def prepare_windows_installer():