Tests: proxy_store fixed in 0.7.53, remove TODO.

proxy-store.t

diff --git a/proxy-store.t b/proxy-store.t
index e6e8c9d..6184d40 100644
--- a/proxy-store.t
+++ b/proxy-store.t
@@ -86,14 +86,10 @@
 
 ok(scalar @{[ glob $t->testdir() . '/proxy_temp/*' ]} == 0, 'no temp files');
 
-TODO: {
-local $TODO = 'patch under review';
-
 http_get('/big', aborted => 1, sleep => 0.1);
 sleep(1);
 
 ok(scalar @{[ glob $t->testdir() . '/proxy_temp/*' ]} == 0,
 	'no temp files after aborted request');
-}
 
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