chore: some lint fixes [(#3750)](GoogleCloudPlatform/python-docs-samples#3750)

Takashi Matsuo · busunkim96 · commit 52eb655eb78d · 2020-09-03T09:27:30.000-06:00
diff --git a/google-cloud-speech/samples/microphone/transcribe_streaming_infinite.py b/google-cloud-speech/samples/microphone/transcribe_streaming_infinite.py
@@ -28,9 +28,9 @@
 
 # [START speech_transcribe_infinite_streaming]
 
-import time
 import re
 import sys
+import time
 
 from google.cloud import speech
 import pyaudio
