Fix Bug#56384 Remove two COPYING files from innobase directory

Remove non applicable licensing files

storage/innobase/COPYING is in the MySQL top level directory and
storage/innobase/COPYING.Sun_Microsystems is not applicable anymore
now that Oracle and Sun are one company.

storage/innobase/COPYING.Sun_Microsystems

-Portions of this software contain modifications contributed by
-Sun Microsystems, Inc. These contributions are used with the following
-license:
-
-Copyright (c) 2009, Sun Microsystems, Inc.
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions
-are met:
-      * Redistributions of source code must retain the above copyright
-        notice, this list of conditions and the following disclaimer.
-      * Redistributions in binary form must reproduce the above
-        copyright notice, this list of conditions and the following
-        disclaimer in the documentation and/or other materials
-        provided with the distribution.
-      * Neither the name of Sun Microsystems, Inc. nor the names of its
-        contributors may be used to endorse or promote products derived
-        from this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.