--- old/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/regexp/joni/ApplyCaseFold.java	2020-04-15 18:51:25.000000000 +0530
+++ /dev/null	2020-04-15 18:51:26.000000000 +0530
@@ -1,65 +0,0 @@
-/*
- * Permission is hereby granted, free of charge, to any person obtaining a copy of
- * this software and associated documentation files (the "Software"), to deal in
- * the Software without restriction, including without limitation the rights to
- * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is furnished to do
- * so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-package jdk.nashorn.internal.runtime.regexp.joni;
-
-import jdk.nashorn.internal.runtime.regexp.joni.ast.CClassNode;
-
-final class ApplyCaseFold {
-
-    // i_apply_case_fold
-    public static void apply(final int from, final int to, final Object o) {
-        final ApplyCaseFoldArg arg = (ApplyCaseFoldArg)o;
-
-        final ScanEnvironment env = arg.env;
-        final CClassNode cc = arg.cc;
-        final BitSet bs = cc.bs;
-
-        final boolean inCC = cc.isCodeInCC(from);
-
-        if (Config.CASE_FOLD_IS_APPLIED_INSIDE_NEGATIVE_CCLASS) {
-            if ((inCC && !cc.isNot()) || (!inCC && cc.isNot())) {
-                if (to >= BitSet.SINGLE_BYTE_SIZE) {
-                    cc.addCodeRange(env, to, to);
-                } else {
-                    /* /(?i:[^A-C])/.match("a") ==> fail. */
-                    bs.set(to);
-                }
-            }
-        } else {
-            if (inCC) {
-                if (to >= BitSet.SINGLE_BYTE_SIZE) {
-                    if (cc.isNot()) {
-                        cc.clearNotFlag();
-                    }
-                    cc.addCodeRange(env, to, to);
-                } else {
-                    if (cc.isNot()) {
-                        bs.clear(to);
-                    } else {
-                        bs.set(to);
-                    }
-                }
-            }
-        } // CASE_FOLD_IS_APPLIED_INSIDE_NEGATIVE_CCLASS
-
-    }
-
-    static final ApplyCaseFold INSTANCE = new ApplyCaseFold();
-}