Do not wait, just .read()

.read() without arguments should read until EOF is received.

tests/test_shells/run_script.py

@@ -12,8 +12,6 @@ from io import BytesIO
 
 import pexpect
 
-from powerline.lib.monotonic import monotonic
-
 
 def get_argparser(ArgumentParser=argparse.ArgumentParser):
 	parser = ArgumentParser(description='Run powerline shell test using pexpect')
@@ -98,14 +96,6 @@ def main():
 				sleep(1)
 				# TODO Implement something more smart
 
-	start = monotonic()
-	while child.isalive():
-		sleep(0.1)
-		if monotonic() - start > 60 * 3:
-			# Waiting for three minutes. This is long enough.
-			child.kill()
-			break
-
 	with open(full_log_file_name, 'wb') as LF:
 		LF.write(child.read())