linux: arm: remove prctrl constants that were never defined

Signed-off-by: Pedro Tammela <[email protected]>

Author: tammela

src/unix/linux_like/linux/gnu/b64/aarch64/mod.rs

@@ -631,10 +631,6 @@ pub const PR_PAC_APGAKEY: c_ulong = 1 << 4;
 
 pub const PR_SME_SET_VL: c_int = 63;
 pub const PR_SME_GET_VL: c_int = 64;
-pub const PR_SME_VL_LEN_MAX: c_int = 0xffff;
-
-pub const PR_SME_SET_VL_INHERIT: c_ulong = 1 << 17;
-pub const PR_SME_SET_VL_ONE_EXEC: c_ulong = 1 << 18;
 
 // Syscall table
 pub const SYS_io_setup: c_long = 0;