GUACAMOLE-2139: Add automatic retrieval of license information where absent. Remove unused license info.

doc/licenses/assert/LICENSE

@@ -2,8 +2,9 @@
 # URL:     https://github.com/browserify/commonjs-assert/
 # From:    'Joyent, Inc. and other Node contributors'
 # License: MIT
+# Source:  https://raw.githubusercontent.com/browserify/commonjs-assert/refs/tags/v${VERSION}/LICENSE
 #
-# --- BEGIN LICENSE FILE ---
+# --- BEGIN LICENSE FILE [1.5.0] ---
 Copyright Joyent, Inc. and other Node contributors. All rights reserved.
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to
@@ -22,4 +23,4 @@ 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.
-# --- END LICENSE FILE ---
+# --- END LICENSE FILE [1.5.0] ---