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diff --git a/apps/mathlib/CMSIS/DSP_Lib/Source/ComplexMathFunctions/arm_cmplx_dot_prod_q31.c b/apps/mathlib/CMSIS/DSP_Lib/Source/ComplexMathFunctions/arm_cmplx_dot_prod_q31.c
deleted file mode 100644
index d371dff8b..000000000
--- a/apps/mathlib/CMSIS/DSP_Lib/Source/ComplexMathFunctions/arm_cmplx_dot_prod_q31.c
+++ /dev/null
@@ -1,145 +0,0 @@
-/* ----------------------------------------------------------------------    
-* Copyright (C) 2010 ARM Limited. All rights reserved.    
-*    
-* $Date:        15. February 2012  
-* $Revision: 	V1.1.0  
-*    
-* Project: 	    CMSIS DSP Library    
-* Title:		arm_cmplx_dot_prod_q31.c    
-*    
-* Description:	Q31 complex dot product    
-*    
-* 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.    
-* -------------------------------------------------------------------- */
-
-#include "arm_math.h"
-
-/**    
- * @ingroup groupCmplxMath    
- */
-
-/**    
- * @addtogroup cmplx_dot_prod    
- * @{    
- */
-
-/**    
- * @brief  Q31 complex dot product    
- * @param  *pSrcA points to the first input vector    
- * @param  *pSrcB points to the second input vector    
- * @param  numSamples number of complex samples in each vector    
- * @param  *realResult real part of the result returned here    
- * @param  *imagResult imaginary part of the result returned here    
- * @return none.    
- *    
- * <b>Scaling and Overflow Behavior:</b>    
- * \par    
- * The function is implemented using an internal 64-bit accumulator.    
- * The intermediate 1.31 by 1.31 multiplications are performed with 64-bit precision and then shifted to 16.48 format.    
- * The internal real and imaginary accumulators are in 16.48 format and provide 15 guard bits.    
- * Additions are nonsaturating and no overflow will occur as long as <code>numSamples</code> is less than 32768.    
- * The return results <code>realResult</code> and <code>imagResult</code> are in 16.48 format.    
- * Input down scaling is not required.    
- */
-
-void arm_cmplx_dot_prod_q31(
-  q31_t * pSrcA,
-  q31_t * pSrcB,
-  uint32_t numSamples,
-  q63_t * realResult,
-  q63_t * imagResult)
-{
-  q63_t real_sum = 0, imag_sum = 0;              /* Temporary result storage */
-
-#ifndef ARM_MATH_CM0
-
-  /* Run the below code for Cortex-M4 and Cortex-M3 */
-  uint32_t blkCnt;                               /* loop counter */
-
-
-  /*loop Unrolling */
-  blkCnt = numSamples >> 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)
-  {
-    /* CReal = A[0]* B[0] + A[2]* B[2] + A[4]* B[4] + .....+ A[numSamples-2]* B[numSamples-2] */
-    /* Convert real data in 2.62 to 16.48 by 14 right shifts */
-    real_sum += (q63_t) * pSrcA++ * (*pSrcB++) >> 14;
-    /* CImag = A[1]* B[1] + A[3]* B[3] + A[5]* B[5] + .....+ A[numSamples-1]* B[numSamples-1] */
-    /* Convert imag data in 2.62 to 16.48 by 14 right shifts */
-    imag_sum += (q63_t) * pSrcA++ * (*pSrcB++) >> 14;
-
-    real_sum += (q63_t) * pSrcA++ * (*pSrcB++) >> 14;
-    imag_sum += (q63_t) * pSrcA++ * (*pSrcB++) >> 14;
-
-    real_sum += (q63_t) * pSrcA++ * (*pSrcB++) >> 14;
-    imag_sum += (q63_t) * pSrcA++ * (*pSrcB++) >> 14;
-
-    real_sum += (q63_t) * pSrcA++ * (*pSrcB++) >> 14;
-    imag_sum += (q63_t) * pSrcA++ * (*pSrcB++) >> 14;
-
-
-    /* Decrement the loop counter */
-    blkCnt--;
-  }
-
-  /* If the numSamples  is not a multiple of 4, compute any remaining output samples here.    
-   ** No loop unrolling is used. */
-  blkCnt = numSamples % 0x4u;
-
-  while(blkCnt > 0u)
-  {
-    /* CReal = A[0]* B[0] + A[2]* B[2] + A[4]* B[4] + .....+ A[numSamples-2]* B[numSamples-2] */
-    real_sum += (q63_t) * pSrcA++ * (*pSrcB++) >> 14;
-    /* CImag = A[1]* B[1] + A[3]* B[3] + A[5]* B[5] + .....+ A[numSamples-1]* B[numSamples-1] */
-    imag_sum += (q63_t) * pSrcA++ * (*pSrcB++) >> 14;
-
-    /* Decrement the loop counter */
-    blkCnt--;
-  }
-
-#else
-
-  /* Run the below code for Cortex-M0 */
-
-  while(numSamples > 0u)
-  {
-    /* outReal = realA[0]* realB[0] + realA[2]* realB[2] + realA[4]* realB[4] + .....+ realA[numSamples-2]* realB[numSamples-2] */
-    real_sum += (q63_t) * pSrcA++ * (*pSrcB++) >> 14;
-    /* outImag = imagA[1]* imagB[1] + imagA[3]* imagB[3] + imagA[5]* imagB[5] + .....+ imagA[numSamples-1]* imagB[numSamples-1] */
-    imag_sum += (q63_t) * pSrcA++ * (*pSrcB++) >> 14;
-
-    /* Decrement the loop counter */
-    numSamples--;
-  }
-
-#endif /* #ifndef ARM_MATH_CM0 */
-
-  /* Store the real and imaginary results in 16.48 format  */
-  *realResult = real_sum;
-  *imagResult = imag_sum;
-}
-
-/**    
- * @} end of cmplx_dot_prod group    
- */