diff --git a/extras/pcf8574/LICENSE b/extras/pcf8574/LICENSE
deleted file mode 100644
index 65c5ca8..0000000
--- a/extras/pcf8574/LICENSE
+++ /dev/null
@@ -1,165 +0,0 @@
- GNU LESSER GENERAL PUBLIC LICENSE
- Version 3, 29 June 2007
-
- Copyright (C) 2007 Free Software Foundation, Inc.
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
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diff --git a/extras/pcf8574/pcf8574.c b/extras/pcf8574/pcf8574.c
index 8add3c2..e92ebc8 100644
--- a/extras/pcf8574/pcf8574.c
+++ b/extras/pcf8574/pcf8574.c
@@ -1,17 +1,3 @@
-/*
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program. If not, see .
- */
#include "pcf8574.h"
#include
diff --git a/extras/pcf8574/pcf8574.h b/extras/pcf8574/pcf8574.h
index ee67ce2..c14e25f 100644
--- a/extras/pcf8574/pcf8574.h
+++ b/extras/pcf8574/pcf8574.h
@@ -1,17 +1,3 @@
-/*
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program. If not, see .
- */
/**
* \file Driver for PCF8574 compartible remote 8-bit I/O expanders for I2C-bus
* \author Ruslan V. Uss
@@ -70,7 +56,7 @@ bool pcf8574_gpio_read(uint8_t addr, uint8_t num);
/**
* \brief Set GPIO pin output
- * Note it's READ - MODIFY - WRITE operation! Please read PCF8574
+ * Note this is READ - MODIFY - WRITE operation! Please read PCF8574
* datasheet first.
* \param addr I2C register address (0b0100 for PCF8574)
* \param num pin number (0..7)