qemu: Don't look for "qemu-kvm" and "kvm" binaries

Both Fedora's qemu-kvm and Debian's/Ubuntu's kvm are nothing
more than paper-thin wrappers around the native QEMU binary,
so we gain nothing by looking for them.
Signed-off-by: NAndrea Bolognani <abologna@redhat.com>

src/qemu/qemu_capabilities.c

@@ -767,8 +767,6 @@ virQEMUCapsInitGuest(virCapsPtr caps,
     if (virQEMUCapsGuestIsNative(hostarch, guestarch) && !binary) {
         const char *kvmbins[] = {
             "/usr/libexec/qemu-kvm", /* RHEL */
-            "qemu-kvm", /* Fedora */
-            "kvm", /* Debian/Ubuntu */
         };
 
         for (i = 0; i < ARRAY_CARDINALITY(kvmbins); ++i) {