Update sgemm_kernel_16x4_skylakex_3.c

kernel/x86_64/sgemm_kernel_16x4_skylakex_3.c

@@ -1,8 +1,3 @@
-#if defined(__apple_build_version__) && __clang_major__ == 11 && __clang_minor__ == 0 && __clang_patchlevel__ == 3
-#pragma clang optimize "O2"
-#endif
-
-
 /* %0 = "+r"(a_pointer), %1 = "+r"(b_pointer), %2 = "+r"(c_pointer), %3 = "+r"(ldc_in_bytes), %4 for k_count, %5 for c_store */
 /* r10 to assist prefetch, r12 = k << 4(const), r13 = k(const), r14 = b_head_pos(const), r15 = %1 + 3r12 */