Removed failing patch for libcurl

It appears to have been fixed upstream.

Signed-off-by: Lars Erik Wik <lars.erik.wik@northern.tech>

Author: larsewi

deps-packaging/libcurl/cfbuild-libcurl.spec

@@ -46,9 +46,6 @@ mkdir -p %{_builddir}
 
 %build
 
-# Fix implicit declaration of function 'fopen' after upgrading to curl 8.17.0.
-patch -p1 < %{_topdir}/SOURCES/implicit-decl-fopen.patch
-
 make
 
 %install