Drop unused patch

Work-around-libev-not-being-c89-compliant.patch

@@ -1,26 +0,0 @@
-From b6f0579cfd44a7e5b84b8239663a56f346acfc47 Mon Sep 17 00:00:00 2001
-From: Robbie Harwood <rharwood@redhat.com>
-Date: Fri, 1 Sep 2017 15:59:49 -0400
-Subject: [PATCH] Work around libev not being c89-compliant
-
-(cherry picked from commit c57599d7039d2435c306830b2edae999c462befb)
-[rharwood@redhat.com: Remove travis files]
----
- configure.ac | 4 ++--
- 1 file changed, 2 insertions(+), 2 deletions(-)
-
-diff --git a/configure.ac b/configure.ac
-index 09ee123..b7b5908 100644
---- a/configure.ac
-+++ b/configure.ac
-@@ -7,8 +7,8 @@ m4_ifdef([AC_USE_SYSTEM_EXTENSIONS],
-     [AC_USE_SYSTEM_EXTENSIONS],
-     [AC_GNU_SOURCE])
- 
--AC_PROG_CC_C89
--for flag in -std=c89 -Wall -Wextra; do
-+AC_PROG_CC_C99
-+for flag in -Wall -Wextra; do
-   AC_TRY_COMPILE([], [return 0;], [CFLAGS="$CFLAGS $flag"],)
- done
-