std.os.linux.thumb: remove some @setRuntimeSafety(false) with no clear purpose

Author: alexrp

lib/std/os/linux/thumb.zig

@@ -8,8 +8,6 @@ const linux = std.os.linux;
 const SYS = linux.SYS;
 
 pub fn syscall0(number: SYS) usize {
-    @setRuntimeSafety(false);
-
     var buf: [2]usize = .{ @intFromEnum(number), undefined };
     return asm volatile (
         \\ str r7, [%[tmp], #4]
@@ -22,8 +20,6 @@ pub fn syscall0(number: SYS) usize {
 }
 
 pub fn syscall1(number: SYS, arg1: usize) usize {
-    @setRuntimeSafety(false);
-
     var buf: [2]usize = .{ @intFromEnum(number), undefined };
     return asm volatile (
         \\ str r7, [%[tmp], #4]
@@ -37,8 +33,6 @@ pub fn syscall1(number: SYS, arg1: usize) usize {
 }
 
 pub fn syscall2(number: SYS, arg1: usize, arg2: usize) usize {
-    @setRuntimeSafety(false);
-
     var buf: [2]usize = .{ @intFromEnum(number), undefined };
     return asm volatile (
         \\ str r7, [%[tmp], #4]
@@ -53,8 +47,6 @@ pub fn syscall2(number: SYS, arg1: usize, arg2: usize) usize {
 }
 
 pub fn syscall3(number: SYS, arg1: usize, arg2: usize, arg3: usize) usize {
-    @setRuntimeSafety(false);
-
     var buf: [2]usize = .{ @intFromEnum(number), undefined };
     return asm volatile (
         \\ str r7, [%[tmp], #4]
@@ -70,8 +62,6 @@ pub fn syscall3(number: SYS, arg1: usize, arg2: usize, arg3: usize) usize {
 }
 
 pub fn syscall4(number: SYS, arg1: usize, arg2: usize, arg3: usize, arg4: usize) usize {
-    @setRuntimeSafety(false);
-
     var buf: [2]usize = .{ @intFromEnum(number), undefined };
     return asm volatile (
         \\ str r7, [%[tmp], #4]
@@ -88,8 +78,6 @@ pub fn syscall4(number: SYS, arg1: usize, arg2: usize, arg3: usize, arg4: usize)
 }
 
 pub fn syscall5(number: SYS, arg1: usize, arg2: usize, arg3: usize, arg4: usize, arg5: usize) usize {
-    @setRuntimeSafety(false);
-
     var buf: [2]usize = .{ @intFromEnum(number), undefined };
     return asm volatile (
         \\ str r7, [%[tmp], #4]
@@ -115,8 +103,6 @@ pub fn syscall6(
     arg5: usize,
     arg6: usize,
 ) usize {
-    @setRuntimeSafety(false);
-
     var buf: [2]usize = .{ @intFromEnum(number), undefined };
     return asm volatile (
         \\ str r7, [%[tmp], #4]