cpu: stm32l1: remove obsolete hwtimer support

cpu/stm32l1/Makefile.include

@@ -1,8 +1,5 @@
 export CPU_ARCH = cortex-m3
 
-# use hwtimer compatibility module
-USEMODULE += hwtimer_compat
-
 # use common periph functions
 USEMODULE += periph_common
 

cpu/stm32l1/include/hwtimer_cpu.h

@@ -1,41 +0,0 @@
-/*
- * Copyright (C) 2014 Freie Universität Berlin
- *
- * This file is subject to the terms and conditions of the GNU Lesser General
- * Public License v2.1. See the file LICENSE in the top level directory for more
- * details.
- */
-
-/**
- * @ingroup         cpu_stm32l1
- * @{
- *
- * @file
- * @brief           CPU specific hwtimer configuration options
- *
- * @author          Thomas Eichinger <thomas.eichinger@fu-berlin.de>
- */
-
-#ifndef HWTIMER_CPU_H_
-#define HWTIMER_CPU_H_
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * @name Hardware timer configuration
- * @{
- */
-#define HWTIMER_MAXTIMERS       (4)             /**< the CPU implementation supports 4 HW timers */
-#define HWTIMER_SPEED           (1000000U)      /**< the HW timer runs with 1MHz */
-#define HWTIMER_MAXTICKS        (0xFFFFFFFF)    /**< 32-bit timer */
-#define HWTIMER_WAIT_OVERHEAD   (3)
-/** @} */
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* HWTIMER_CPU_H_ */
-/** @} */