Remove old asm pause from third_party

third_party/pause/LICENSE

-The Expat/MIT License
-
-Permission is hereby granted, free of charge, to any person obtaining a
-copy of this software and associated documentation files (the "Software"),
-to deal in the Software without restriction, including without limitation
-the rights to use, copy, modify, merge, publish, distribute, sublicense,
-and/or sell copies of the Software, and to permit persons to whom the 
-Software is furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in 
-all copies or substantial portions of the Software. 
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL 
-THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
-FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
-DEALINGS IN THE SOFTWARE.

third_party/pause/Makefile

-pause: pause.asm
-ifneq ($(shell uname), Linux)
-	echo "Must build on Linux"
-	exit 1
-else
-	nasm -o $@ $<
-	chmod +x pause
-endif
-
-all: pause
-
-clean:
-	rm -f pause

third_party/pause/pause.asm

-; This is heavily based on https://github.com/tianon/dockerfiles/tree/master/true
-; which is in turn especially thanks to:
-; http://blog.markloiseau.com/2012/05/tiny-64-bit-elf-executables/
-
-BITS 64
-	org	0x00400000	; Program load offset
-
-; 64-bit ELF header
-ehdr:
-	;  1), 0 (ABI ver.)
-	db 0x7F, "ELF", 2, 1, 1, 0       ; e_ident
-	times 8 db 0                     ; reserved (zeroes)
-
-	dw 2              ; e_type:	Executable file
-	dw 0x3e           ; e_machine:	AMD64
-	dd 1              ; e_version:	current version
-	dq _start         ; e_entry:	program entry address (0x78)
-	dq phdr - $$      ; e_phoff	program header offset (0x40)
-	dq 0              ; e_shoff	no section headers
-	dd 0              ; e_flags	no flags
-	dw ehdrsize       ; e_ehsize:	ELF header size (0x40)
-	dw phdrsize       ; e_phentsize:	program header size (0x38)
-	dw 1              ; e_phnum:	one program header
-	dw 0              ; e_shentsize
-	dw 0              ; e_shnum
-	dw 0              ; e_shstrndx
-
-ehdrsize equ $ - ehdr
-
-; 64-bit ELF program header
-phdr:
-	dd 1              ; p_type:	loadable segment
-	dd 5              ; p_flags	read and execute
-	dq 0              ; p_offset
-	dq $$             ; p_vaddr:	start of the current section
-	dq $$             ; p_paddr:	"		"
-	dq filesize       ; p_filesz
-	dq filesize       ; p_memsz
-	dq 0x200000       ; p_align:	2^11=200000 = section alignment
-
-; program header size
-phdrsize equ $ - phdr
-
-_start:
-	; pause()
-
-	mov	al, 34	; pause syscall number
-	syscall
-
-	; sys_exit(return_code)
-
-	mov	al, 60	; sys_exit syscall number
-	cdq		; Sign-extend eax into edi to return 0 (success)
-	syscall
-
-; File size calculation
-filesize equ $ - $$