ROMFS: Strip README files

Tools/px_romfs_pruner.py

@@ -68,6 +68,11 @@ def main():
                 os.remove(file_path)
                 continue
 
+            # delete documentation
+            if file.startswith("README"):
+                os.remove(file_path)
+                continue
+
             # only prune text files
             if ".zip" in file or ".bin" in file or ".swp" in file \
                     or ".data" in file or ".DS_Store" in file: