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diff --git a/apps/mathlib/CMSIS/DSP_Lib/Source/BasicMathFunctions/arm_mult_q7.c b/apps/mathlib/CMSIS/DSP_Lib/Source/BasicMathFunctions/arm_mult_q7.c
deleted file mode 100644
index 14ee23ea6..000000000
--- a/apps/mathlib/CMSIS/DSP_Lib/Source/BasicMathFunctions/arm_mult_q7.c
+++ /dev/null
@@ -1,128 +0,0 @@
-/* ----------------------------------------------------------------------    
-* Copyright (C) 2010 ARM Limited. All rights reserved.    
-*    
-* $Date:        15. February 2012  
-* $Revision: 	V1.1.0  
-*    
-* Project: 	    CMSIS DSP Library    
-* Title:	    arm_mult_q7.c    
-*    
-* Description:	Q7 vector multiplication.    
-*    
-* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
-*  
-* Version 1.1.0 2012/02/15 
-*    Updated with more optimizations, bug fixes and minor API changes.  
-*   
-* Version 1.0.10 2011/7/15  
-*    Big Endian support added and Merged M0 and M3/M4 Source code.   
-*    
-* Version 1.0.3 2010/11/29   
-*    Re-organized the CMSIS folders and updated documentation.    
-*     
-* Version 1.0.2 2010/11/11    
-*    Documentation updated.     
-*    
-* Version 1.0.1 2010/10/05     
-*    Production release and review comments incorporated.    
-*    
-* Version 1.0.0 2010/09/20     
-*    Production release and review comments incorporated.    
-*    
-* Version 0.0.7  2010/06/10     
-*    Misra-C changes done    
-*    
-* Version 0.0.5  2010/04/26     
-*    incorporated review comments and updated with latest CMSIS layer    
-*    
-* Version 0.0.3  2010/03/10 DP    
-*    Initial version    
-* -------------------------------------------------------------------- */
-
-#include "arm_math.h"
-
-/**    
- * @ingroup groupMath    
- */
-
-/**    
- * @addtogroup BasicMult    
- * @{    
- */
-
-/**    
- * @brief           Q7 vector multiplication    
- * @param[in]       *pSrcA points to the first input vector    
- * @param[in]       *pSrcB points to the second input vector    
- * @param[out]      *pDst points to the output vector    
- * @param[in]       blockSize number of samples in each vector    
- * @return none.    
- *    
- * <b>Scaling and Overflow Behavior:</b>    
- * \par    
- * The function uses saturating arithmetic.    
- * Results outside of the allowable Q7 range [0x80 0x7F] will be saturated.    
- */
-
-void arm_mult_q7(
-  q7_t * pSrcA,
-  q7_t * pSrcB,
-  q7_t * pDst,
-  uint32_t blockSize)
-{
-  uint32_t blkCnt;                               /* loop counters */
-
-#ifndef ARM_MATH_CM0
-
-/* Run the below code for Cortex-M4 and Cortex-M3 */
-  q7_t out1, out2, out3, out4;                   /* Temporary variables to store the product */
-
-  /* loop Unrolling */
-  blkCnt = blockSize >> 2u;
-
-  /* First part of the processing with loop unrolling.  Compute 4 outputs at a time.    
-   ** a second loop below computes the remaining 1 to 3 samples. */
-  while(blkCnt > 0u)
-  {
-    /* C = A * B */
-    /* Multiply the inputs and store the results in temporary variables */
-    out1 = (q7_t) __SSAT((((q15_t) (*pSrcA++) * (*pSrcB++)) >> 7), 8);
-    out2 = (q7_t) __SSAT((((q15_t) (*pSrcA++) * (*pSrcB++)) >> 7), 8);
-    out3 = (q7_t) __SSAT((((q15_t) (*pSrcA++) * (*pSrcB++)) >> 7), 8);
-    out4 = (q7_t) __SSAT((((q15_t) (*pSrcA++) * (*pSrcB++)) >> 7), 8);
-
-    /* Store the results of 4 inputs in the destination buffer in single cycle by packing */
-    *__SIMD32(pDst)++ = __PACKq7(out1, out2, out3, out4);
-
-    /* Decrement the blockSize loop counter */
-    blkCnt--;
-  }
-
-  /* If the blockSize is not a multiple of 4, compute any remaining output samples here.    
-   ** No loop unrolling is used. */
-  blkCnt = blockSize % 0x4u;
-
-#else
-
-  /* Run the below code for Cortex-M0 */
-
-  /* Initialize blkCnt with number of samples */
-  blkCnt = blockSize;
-
-#endif /* #ifndef ARM_MATH_CM0 */
-
-
-  while(blkCnt > 0u)
-  {
-    /* C = A * B */
-    /* Multiply the inputs and store the result in the destination buffer */
-    *pDst++ = (q7_t) __SSAT((((q15_t) (*pSrcA++) * (*pSrcB++)) >> 7), 8);
-
-    /* Decrement the blockSize loop counter */
-    blkCnt--;
-  }
-}
-
-/**    
- * @} end of BasicMult group    
- */