LibWeb: Remove the rebaseline-libweb-test script

This is superseded by the headless-browser --rebaseline flag.

(cherry picked from commit d33a87c8c41d77722e4a0ebb72f5bcec0f3b1c41)

Tests/LibWeb/rebaseline-libweb-test

@@ -1,20 +0,0 @@
-#!/bin/bash
-set +e
-
-t=$1
-if echo -n $t | grep ^file: ; then
-    t=$(echo -n $t | sed s@^file://@@)
-fi
-
-if echo -n $t | grep Layout ; then
-    mode_flag="-d"
-else
-    mode_flag="-T"
-fi
-
-input_dir=$(dirname $t)
-expected_dir=$(echo $input_dir | sed s/input/expected/)
-test_name=$(basename $t .html)
-cd $SERENITY_SOURCE_DIR/Build/lagom
-mkdir -p $expected_dir
-./bin/headless-browser -r $SERENITY_SOURCE_DIR/Build/lagom/share/Lagom $mode_flag --layout-test-mode $input_dir/$test_name.html > $expected_dir/$test_name.txt