licenses: Remove UnRAR, only used by one port.

The "unrar" port now has its own copy.

data/system/data/licenses/UnRAR

@@ -1,40 +0,0 @@
- ******    *****   ******   UnRAR - free utility for RAR archives
- **   **  **   **  **   **  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- ******   *******  ******    License for use and distribution of
- **   **  **   **  **   **   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- **   **  **   **  **   **         FREE portable version
-                                   ~~~~~~~~~~~~~~~~~~~~~
-
-      The source code of UnRAR utility is freeware. This means:
-
-   1. All copyrights to RAR and the utility UnRAR are exclusively
-      owned by the author - Alexander Roshal.
-
-   2. The UnRAR sources may be used in any software to handle RAR
-      archives without limitations free of charge, but cannot be used
-      to re-create the RAR compression algorithm, which is proprietary.
-      Distribution of modified UnRAR sources in separate form or as a
-      part of other software is permitted, provided that it is clearly
-      stated in the documentation and source comments that the code may
-      not be used to develop a RAR (WinRAR) compatible archiver.
-
-   3. The UnRAR utility may be freely distributed. It is allowed
-      to distribute UnRAR inside of other software packages.
-
-   4. THE RAR ARCHIVER AND THE UnRAR UTILITY ARE DISTRIBUTED "AS IS".
-      NO WARRANTY OF ANY KIND IS EXPRESSED OR IMPLIED.  YOU USE AT 
-      YOUR OWN RISK. THE AUTHOR WILL NOT BE LIABLE FOR DATA LOSS, 
-      DAMAGES, LOSS OF PROFITS OR ANY OTHER KIND OF LOSS WHILE USING
-      OR MISUSING THIS SOFTWARE.
-
-   5. Installing and using the UnRAR utility signifies acceptance of
-      these terms and conditions of the license.
-
-   6. If you don't agree with terms of the license you must remove
-      UnRAR files from your storage devices and cease to use the
-      utility.
-
-      Thank you for your interest in RAR and UnRAR.
-
-
-                                            Alexander L. Roshal