Clean up legacy linalg implementation from the backend (#1887)

* Clean up legacy linalg implementation from the backend

* fix pre-commit

Author: npolina4

dpnp/backend/CMakeLists.txt

@@ -30,7 +30,6 @@ set(DPNP_SRC
     kernels/dpnp_krnl_elemwise.cpp
     kernels/dpnp_krnl_fft.cpp
     kernels/dpnp_krnl_indexing.cpp
-    kernels/dpnp_krnl_linalg.cpp
     kernels/dpnp_krnl_logic.cpp
     kernels/dpnp_krnl_manipulation.cpp
     kernels/dpnp_krnl_mathematical.cpp