Update export.py (#11077)

Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>

export.py

@@ -413,7 +413,7 @@ def export_edgetpu(file, prefix=colorstr('Edge TPU:')):
     cmd = 'edgetpu_compiler --version'
     help_url = 'https://coral.ai/docs/edgetpu/compiler/'
     assert platform.system() == 'Linux', f'export only supported on Linux. See {help_url}'
-    if subprocess.run(f'{cmd} >/dev/null', shell=True).returncode != 0:
+    if subprocess.run(f'{cmd} > /dev/null 2>&1', shell=True).returncode != 0:
         LOGGER.info(f'\n{prefix} export requires Edge TPU compiler. Attempting install from {help_url}')
         sudo = subprocess.run('sudo --version >/dev/null', shell=True).returncode == 0  # sudo installed on system
         for c in (