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diff --git a/src/modules/mathlib/CMSIS/DSP_Lib/Source/ComplexMathFunctions/arm_cmplx_mult_cmplx_q15.c b/src/modules/mathlib/CMSIS/DSP_Lib/Source/ComplexMathFunctions/arm_cmplx_mult_cmplx_q15.c
deleted file mode 100644
index 0219aea48..000000000
--- a/src/modules/mathlib/CMSIS/DSP_Lib/Source/ComplexMathFunctions/arm_cmplx_mult_cmplx_q15.c
+++ /dev/null
@@ -1,185 +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_mult_cmplx_q15.c
-*
-* Description: Q15 complex-by-complex 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.
-* -------------------------------------------------------------------- */
-
-#include "arm_math.h"
-
-/**
- * @ingroup groupCmplxMath
- */
-
-/**
- * @addtogroup CmplxByCmplxMult
- * @{
- */
-
-/**
- * @brief Q15 complex-by-complex 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] numSamples number of complex samples in each vector
- * @return none.
- *
- * <b>Scaling and Overflow Behavior:</b>
- * \par
- * The function implements 1.15 by 1.15 multiplications and finally output is converted into 3.13 format.
- */
-
-void arm_cmplx_mult_cmplx_q15(
- q15_t * pSrcA,
- q15_t * pSrcB,
- q15_t * pDst,
- uint32_t numSamples)
-{
- q15_t a, b, c, d; /* Temporary variables to store real and imaginary values */
-
-#ifndef ARM_MATH_CM0
-
- /* Run the below code for Cortex-M4 and Cortex-M3 */
- uint32_t blkCnt; /* loop counters */
-
- /* 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)
- {
- /* C[2 * i] = A[2 * i] * B[2 * i] - A[2 * i + 1] * B[2 * i + 1]. */
- /* C[2 * i + 1] = A[2 * i] * B[2 * i + 1] + A[2 * i + 1] * B[2 * i]. */
- a = *pSrcA++;
- b = *pSrcA++;
- c = *pSrcB++;
- d = *pSrcB++;
-
- /* store the result in 3.13 format in the destination buffer. */
- *pDst++ =
- (q15_t) (q31_t) (((q31_t) a * c) >> 17) - (((q31_t) b * d) >> 17);
- /* store the result in 3.13 format in the destination buffer. */
- *pDst++ =
- (q15_t) (q31_t) (((q31_t) a * d) >> 17) + (((q31_t) b * c) >> 17);
-
- a = *pSrcA++;
- b = *pSrcA++;
- c = *pSrcB++;
- d = *pSrcB++;
-
- /* store the result in 3.13 format in the destination buffer. */
- *pDst++ =
- (q15_t) (q31_t) (((q31_t) a * c) >> 17) - (((q31_t) b * d) >> 17);
- /* store the result in 3.13 format in the destination buffer. */
- *pDst++ =
- (q15_t) (q31_t) (((q31_t) a * d) >> 17) + (((q31_t) b * c) >> 17);
-
- a = *pSrcA++;
- b = *pSrcA++;
- c = *pSrcB++;
- d = *pSrcB++;
-
- /* store the result in 3.13 format in the destination buffer. */
- *pDst++ =
- (q15_t) (q31_t) (((q31_t) a * c) >> 17) - (((q31_t) b * d) >> 17);
- /* store the result in 3.13 format in the destination buffer. */
- *pDst++ =
- (q15_t) (q31_t) (((q31_t) a * d) >> 17) + (((q31_t) b * c) >> 17);
-
- a = *pSrcA++;
- b = *pSrcA++;
- c = *pSrcB++;
- d = *pSrcB++;
-
- /* store the result in 3.13 format in the destination buffer. */
- *pDst++ =
- (q15_t) (q31_t) (((q31_t) a * c) >> 17) - (((q31_t) b * d) >> 17);
- /* store the result in 3.13 format in the destination buffer. */
- *pDst++ =
- (q15_t) (q31_t) (((q31_t) a * d) >> 17) + (((q31_t) b * c) >> 17);
-
- /* 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 = numSamples % 0x4u;
-
- while(blkCnt > 0u)
- {
- /* C[2 * i] = A[2 * i] * B[2 * i] - A[2 * i + 1] * B[2 * i + 1]. */
- /* C[2 * i + 1] = A[2 * i] * B[2 * i + 1] + A[2 * i + 1] * B[2 * i]. */
- a = *pSrcA++;
- b = *pSrcA++;
- c = *pSrcB++;
- d = *pSrcB++;
-
- /* store the result in 3.13 format in the destination buffer. */
- *pDst++ =
- (q15_t) (q31_t) (((q31_t) a * c) >> 17) - (((q31_t) b * d) >> 17);
- /* store the result in 3.13 format in the destination buffer. */
- *pDst++ =
- (q15_t) (q31_t) (((q31_t) a * d) >> 17) + (((q31_t) b * c) >> 17);
-
- /* Decrement the blockSize loop counter */
- blkCnt--;
- }
-
-#else
-
- /* Run the below code for Cortex-M0 */
-
- while(numSamples > 0u)
- {
- /* C[2 * i] = A[2 * i] * B[2 * i] - A[2 * i + 1] * B[2 * i + 1]. */
- /* C[2 * i + 1] = A[2 * i] * B[2 * i + 1] + A[2 * i + 1] * B[2 * i]. */
- a = *pSrcA++;
- b = *pSrcA++;
- c = *pSrcB++;
- d = *pSrcB++;
-
- /* store the result in 3.13 format in the destination buffer. */
- *pDst++ =
- (q15_t) (q31_t) (((q31_t) a * c) >> 17) - (((q31_t) b * d) >> 17);
- /* store the result in 3.13 format in the destination buffer. */
- *pDst++ =
- (q15_t) (q31_t) (((q31_t) a * d) >> 17) + (((q31_t) b * c) >> 17);
-
- /* Decrement the blockSize loop counter */
- numSamples--;
- }
-
-#endif /* #ifndef ARM_MATH_CM0 */
-
-}
-
-/**
- * @} end of CmplxByCmplxMult group
- */
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