net-ftp/proftpd: remove unused patch

Package-Manager: Portage-2.3.100, Repoman-2.3.22
Signed-off-by: Michael Mair-Keimberger <m.mairkeimberger@gmail.com>
Closes: https://github.com/gentoo/gentoo/pull/16296
Signed-off-by: Aaron Bauman <bman@gentoo.org>

net-ftp/proftpd/files/proftpd-1.3.6a-fix-libcheck.patch

@@ -1,28 +0,0 @@
-Fix test suite detection.
-
-https://github.com/proftpd/proftpd/pull/839
-
-Reported-by: Toralf Förster
-Bug: https://bugs.gentoo.org/697782
---- a/configure.in
-+++ b/configure.in
-@@ -991,7 +991,7 @@ AC_ARG_ENABLE(tests,
-     [enable unit tests (default=no)])
-   ],
-   [
--    if test "$enableval" != xno ; then
-+    if test x"$enableval" != xno ; then
-       AC_CHECK_HEADERS(check.h)
- 
-       AC_CHECK_LIB(check, tcase_create,
---- a/configure
-+++ b/configure
-@@ -20639,7 +20639,7 @@ ENABLE_TESTS="\"\""
- # Check whether --enable-tests was given.
- if test "${enable_tests+set}" = set; then
-   enableval=$enable_tests;
--    if test "$enableval" != xno ; then
-+    if test x"$enableval" != xno ; then
- 
- for ac_header in check.h
- do