Remove library 'simple-template-matrix'

.gitmodules

libs/simple-template-matrix

src/shared/kalman/Kalman.h

src/shared/math/RLS.h

src/tests/catch/test-kalman.cpp

src/tests/catch/test-matrix.cpp

src/tests/kalman/test-kalman-benchmark.cpp

src/tests/test-rls.cpp