test: remove test for 'keep-alive'

Only applicable to HTTP/1.1.

Author: Krinkle

test/CodeoriginTest.php

@@ -31,7 +31,6 @@
 	'content-type' => 'application/javascript; charset=utf-8',
 	'content-length' => '263268',
 	'last-modified' => 'Fri, 18 Oct 1991 12:00:00 GMT',
-	'connection' => 'keep-alive',
 	'vary' => 'Accept-Encoding',
 	'etag' => '"28feccc0-40464"',
 	'cache-control' => 'max-age=315360000, public',
@@ -45,7 +44,6 @@
 	'content-type' => 'text/css',
 	'content-length' => '7456',
 	'last-modified' => 'Fri, 18 Oct 1991 12:00:00 GMT',
-	'connection' => 'keep-alive',
 	'vary' => 'Accept-Encoding',
 	'etag' => '"28feccc0-1d20"',
 	'cache-control' => 'max-age=315360000, public',
@@ -59,7 +57,6 @@
 	'content-type' => 'image/png',
 	'content-length' => '4369',
 	'last-modified' => 'Fri, 18 Oct 1991 12:00:00 GMT',
-	'connection' => 'keep-alive',
 	'etag' => '"28feccc0-1111"',
 	'cache-control' => 'max-age=315360000, public',
 	'access-control-allow-origin' => '*',
@@ -72,7 +69,6 @@
 	'content-type' => 'application/octet-stream',
 	'content-length' => '126081',
 	'last-modified' => 'Fri, 18 Oct 1991 12:00:00 GMT',
-	'connection' => 'keep-alive',
 	'etag' => '"28feccc0-1ec81"',
 	'cache-control' => 'max-age=315360000, public',
 	'access-control-allow-origin' => '*',
@@ -89,7 +85,6 @@
 	'content-type' => 'application/javascript; charset=utf-8',
 	'content-length' => '263268',
 	'last-modified' => 'Fri, 18 Oct 1991 12:00:00 GMT',
-	'connection' => 'keep-alive',
 	'vary' => 'Accept-Encoding',
 	'etag' => '"28feccc0-40464"',
 	'cache-control' => 'max-age=315360000, public',