Remove cbindgen

When build suricata in Docker, alamalinux does not
have cbindgen package.

configure.ac

@@ -2619,36 +2619,6 @@ fi
        fi
     fi
 
-    AC_PATH_PROG(CBINDGEN, cbindgen, "no")
-    if test "x$CBINDGEN" != "xno"; then
-      cbindgen_version=$(cbindgen --version | cut -d' ' -f2-)
-      min_cbindgen_version="0.10.0"
-      AS_VERSION_COMPARE([$cbindgen_version], [$min_cbindgen_version],
-          [cbindgen_ok="no"],
-          [cbindgen_ok="yes"],
-          [cbindgen_ok="yes"])
-      if test "x$cbindgen_ok" != "xyes"; then
-        echo "  Warning: cbindgen must be at least version $min_cbindgen_version,"
-        echo "      found $cbindgen_version."
-        echo "  To update: cargo install --force cbindgen"
-        CBINDGEN="no"
-      else
-        have_rust_headers="no"
-      fi
-    fi
-
-    AC_SUBST([CBINDGEN], [$CBINDGEN])
-
-    # Require cbindgen if generated headers are not bundled.
-    if test "x$have_rust_headers" != "xyes"; then
-      if test "x$CBINDGEN" = "xno"; then
-        echo "  Warning: cbindgen too old or not found, it is required to "
-        echo "      generate header files."
-        echo "  To install: cargo install --force cbindgen"
-        AC_MSG_ERROR([cbindgen required])
-      fi
-    fi
-
     AM_CONDITIONAL([HAVE_RUST_HEADERS], [test "x$have_rust_headers" = "xyes"])
     AM_CONDITIONAL([HAVE_CBINDGEN], [test "x$CBINDGEN" != "xno"])
     AM_CONDITIONAL([HAVE_CARGO_VENDOR], [test "x$have_cargo_vendor" != "xno"])