removed unused import [ci skip]

main/filesystem-crypto/src/main/java/org/cryptomator/crypto/engine/impl/FileContentDecryptorImpl.java

@@ -11,7 +11,6 @@ package org.cryptomator.crypto.engine.impl;
 import static org.cryptomator.crypto.engine.impl.FileContentCryptorImpl.CHUNK_SIZE;
 import static org.cryptomator.crypto.engine.impl.FileContentCryptorImpl.MAC_SIZE;
 import static org.cryptomator.crypto.engine.impl.FileContentCryptorImpl.NONCE_SIZE;
-import static org.cryptomator.crypto.engine.impl.FileContentCryptorImpl.PAYLOAD_SIZE;
 
 import java.io.IOException;
 import java.io.UncheckedIOException;