std.os.linux: remove unused MMAP2_UNIT constant

Author: sweiglbosker

lib/std/os/linux/arm.zig

@@ -170,8 +170,6 @@ pub fn restore_rt() callconv(.naked) noreturn {
     }
 }
 
-pub const MMAP2_UNIT = 4096;
-
 pub const F = struct {
     pub const DUPFD = 0;
     pub const GETFD = 1;

lib/std/os/linux/hexagon.zig

@@ -251,8 +251,6 @@ pub const Stat = extern struct {
 
 pub const Elf_Symndx = u32;
 
-pub const MMAP2_UNIT = 4096;
-
 pub const VDSO = void;
 
 /// TODO

lib/std/os/linux/m68k.zig

@@ -284,10 +284,6 @@ pub const Stat = extern struct {
 
 pub const Elf_Symndx = u32;
 
-// m68k has multiple minimum page sizes.
-// glibc sets MMAP2_PAGE_UNIT to -1 so it is queried at runtime.
-pub const MMAP2_UNIT = -1;
-
 // glibc 112a0ae18b831bf31f44d81b82666980312511d6
 pub const VDSO = void;
 

lib/std/os/linux/mips.zig

@@ -294,8 +294,6 @@ pub const F = struct {
     pub const GETOWNER_UIDS = 17;
 };
 
-pub const MMAP2_UNIT = 4096;
-
 pub const VDSO = struct {
     pub const CGT_SYM = "__vdso_clock_gettime";
     pub const CGT_VER = "LINUX_2.6";

lib/std/os/linux/mips64.zig

@@ -273,8 +273,6 @@ pub const F = struct {
     pub const GETOWNER_UIDS = 17;
 };
 
-pub const MMAP2_UNIT = 4096;
-
 pub const VDSO = struct {
     pub const CGT_SYM = "__vdso_clock_gettime";
     pub const CGT_VER = "LINUX_2.6";

lib/std/os/linux/powerpc.zig

@@ -348,7 +348,5 @@ pub const ucontext_t = extern struct {
 
 pub const Elf_Symndx = u32;
 
-pub const MMAP2_UNIT = 4096;
-
 /// TODO
 pub const getcontext = {};

lib/std/os/linux/riscv32.zig

@@ -256,8 +256,6 @@ pub const Stat = extern struct {
 
 pub const Elf_Symndx = u32;
 
-pub const MMAP2_UNIT = 4096;
-
 pub const VDSO = struct {
     pub const CGT_SYM = "__vdso_clock_gettime";
     pub const CGT_VER = "LINUX_4.15";

lib/std/os/linux/x86.zig

@@ -230,8 +230,6 @@ pub const F = struct {
     pub const UNLCK = 2;
 };
 
-pub const MMAP2_UNIT = 4096;
-
 pub const VDSO = struct {
     pub const CGT_SYM = "__vdso_clock_gettime";
     pub const CGT_VER = "LINUX_2.6";