Update MKL.jl

Author: ViralBShah

src/MKL.jl

@@ -40,9 +40,6 @@ function __init__()
     if MKL_jll.is_available()
         if Sys.isapple()
             set_threading_layer(THREADING_SEQUENTIAL)
-        else
-            # Temporarily make everything sequential to see if tests pass
-            set_threading_layer(THREADING_SEQUENTIAL)
         end
         # MKL 2022 and onwards have 64_ for ILP64 suffixes. The LP64 interface
         # includes LP64 APIs for the non-suffixed symbols and ILP64 API for the