Revert "Explicitly enable OpenSSL on non-windows"

Accidental commit, OpenSSL 3.0 with Apache license is not out yet.

This reverts commit 3f06639835.

scripts.d/25-openssl.sh

@@ -48,13 +48,3 @@ ffbuild_dockerbuild() {
     make -j$(nproc)
     make install_sw
 }
-
-ffbuild_configure() {
-    [[ $TARGET == win* ]] && return
-    echo --enable-openssl
-}
-
-ffbuild_unconfigure() {
-    [[ $TARGET == win* ]] && return
-    echo --disable-openssl
-}