[Gradle, JS] Remove custom source-map-loader

#KT-39377 fixed

license/README.md

@@ -204,10 +204,6 @@ any distributions of the tools or libraries:
       - License: MIT ([license/third_party/mocha-teamcity-reporter_LICENSE.txt](third_party/mocha-teamcity-reporter_LICENSE.txt)
              and [license/third_party/teamcity-service-messages_LICENSE.txt](third_party/teamcity-service-messages_LICENSE.txt))
       - Origin: Copyright (c) 2016 Jamie Sherriff and Copyright (c) 2013 Aaron Forsander
-      
- - Path: libraries/tools/kotlin-source-map-loader/kotlin-source-map-loader.js
-      - License: MIT ([license/third_party/source-map-loader_LICENSE.txt](third_party/source-map-loader_LICENSE.txt))
-      - Origin: Copyright JS Foundation and other contributors
 
 ## Example Code
 

license/third_party/source-map-loader_LICENSE.txt

@@ -1,20 +0,0 @@
-Copyright JS Foundation and other contributors
-
-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.