remove unused patch

Signed-off-by: Igor Gnatenko <ignatenkobrain@fedoraproject.org>

0001-Work-around-mtime-being-set-to-0-sometimes.patch

@@ -1,28 +0,0 @@
-From b34f744ac3c8276a854b134d41c28d84664c7e7f Mon Sep 17 00:00:00 2001
-From: Patrick Griffis <tingping@tingping.se>
-Date: Mon, 20 Mar 2017 21:46:42 -0400
-Subject: [PATCH] Work around mtime being set to 0 sometimes
-
----
- src/disk_interface.cc | 5 +++++
- 1 file changed, 5 insertions(+)
-
-diff --git a/src/disk_interface.cc b/src/disk_interface.cc
-index b418e04..28530b1 100644
---- a/src/disk_interface.cc
-+++ b/src/disk_interface.cc
-@@ -187,6 +187,11 @@ TimeStamp RealDiskInterface::Stat(const string& path, string* err) const {
-     *err = "stat(" + path + "): " + strerror(errno);
-     return -1;
-   }
-+  // Some users (Flatpak) set mtime to 0, this should be harmless
-+  // and avoids conflicting with our return value of 0 meaning
-+  // that it doesn't exist.
-+  if (st.st_mtime == 0)
-+    return 1;
-   return st.st_mtime;
- #endif
- }
--- 
-2.13.0
-