remove duplicate entries in licenseInfoInFile

Signed-off-by: Alberto Pianon <alberto@pianon.eu>

aliens4friends/commons/scancode2alienspdx.py

@@ -233,6 +233,8 @@ class Debian2AlienSPDX(Scancode2AlienSPDX):
 				alien_spdx_files.append(alien_file)
 		self.alien_spdx = self._debian_spdx
 		self.alien_spdx.package.files = alien_spdx_files
+		for alien_file in self.alien_spdx.package.files:
+			alien_file.licenses_in_file = list(set(alien_file.licenses_in_file))
 
 		if proximity < NEARLY_FULL_PROXIMITY:
 			logger.info(