Don't generate sys/linux-unistd.h

linux-unistd.h was here for reference purposes, but shouldn't
have been accessible to client code. Delete it.

Change-Id: I60c264ff6ca489a48117914bdf6daa486737af8c

libc/tools/gensyscalls.py

@@ -510,23 +510,6 @@ class State:
         self.other_files.append( path )
 
 
-    # now dump the content of linux/_syscalls.h
-    def gen_linux_unistd_h(self):
-        path = "include/sys/linux-unistd.h"
-        D( "generating "+path )
-        fp = create_file( path )
-        fp.write( "/* auto-generated by gensyscalls.py, do not touch */\n" )
-        fp.write( "#ifndef _BIONIC_LINUX_UNISTD_H_\n\n" );
-        fp.write( "#ifdef __cplusplus\nextern \"C\" {\n#endif\n\n" )
-
-        for sc in self.syscalls:
-            fp.write( sc["decl"]+"\n" )
-
-        fp.write( "#ifdef __cplusplus\n}\n#endif\n" )
-        fp.write( "\n#endif /* _BIONIC_LINUX_UNISTD_H_ */\n" );
-        fp.close()
-        self.other_files.append( path )
-
     # now dump the contents of syscalls.mk
     def gen_arch_syscalls_mk(self, arch):
         path = "arch-%s/syscalls.mk" % arch
@@ -612,7 +595,6 @@ class State:
         self.gen_linux_syscalls_h()
         for arch in all_archs:
             self.gen_arch_syscalls_mk(arch)
-        self.gen_linux_unistd_h()
         self.gen_syscall_stubs()
 
         D( "comparing files" )