Revert "[libc] add epoll_wait functions" (llvm#79534)

Reverts llvm#79515

Some minor breakages. Will fix tomorrow.

Author: michaelrj-google

libc/config/linux/aarch64/entrypoints.txt

@@ -172,11 +172,6 @@ set(TARGET_LIBC_ENTRYPOINTS
     # sys/auxv.h entrypoints
     libc.src.sys.auxv.getauxval
 
-    # sys/epoll.h entrypoints
-    libc.src.sys.epoll.epoll_wait
-    libc.src.sys.epoll.epoll_pwait
-    libc.src.sys.epoll.epoll_pwait2
-
     # termios.h entrypoints
     libc.src.termios.cfgetispeed
     libc.src.termios.cfgetospeed

libc/config/linux/aarch64/headers.txt

@@ -24,5 +24,4 @@ set(TARGET_PUBLIC_HEADERS
     libc.include.unistd
 
     libc.include.sys_ioctl
-    libc.include.sys_epoll
 )

libc/config/linux/api.td

@@ -1,11 +1,11 @@
 include "config/public_api.td"
 
-include "spec/stdc.td"
-include "spec/posix.td"
-include "spec/linux.td"
-include "spec/gnu_ext.td"
 include "spec/bsd_ext.td"
+include "spec/gnu_ext.td"
+include "spec/linux.td"
 include "spec/llvm_libc_ext.td"
+include "spec/posix.td"
+include "spec/stdc.td"
 
 def AssertMacro : MacroDef<"assert"> {
   let Defn = [{
@@ -242,10 +242,6 @@ def SysUtsNameAPI : PublicAPI<"sys/utsname.h"> {
   let Types = ["struct utsname"];
 }
 
-def SysEpollAPI : PublicAPI<"sys/epoll.h"> {
-  let Types = ["struct epoll_event", "struct epoll_data", "sigset_t", "struct timespec"];
-}
-
 def SpawnAPI : PublicAPI<"spawn.h"> {
   let Types = ["mode_t", "pid_t", "posix_spawnattr_t", "posix_spawn_file_actions_t"];
 }

libc/config/linux/arm/entrypoints.txt

@@ -95,12 +95,6 @@ set(TARGET_LIBC_ENTRYPOINTS
 
     # sys/prctl.h entrypoints
     libc.src.sys.prctl.prctl
-
-    # sys/epoll.h entrypoints
-    libc.src.sys.epoll.epoll_wait
-    libc.src.sys.epoll.epoll_pwait
-    libc.src.sys.epoll.epoll_pwait2
-
 )
 
 set(TARGET_LIBM_ENTRYPOINTS

libc/config/linux/arm/headers.txt

@@ -9,6 +9,4 @@ set(TARGET_PUBLIC_HEADERS
     libc.include.string
     libc.include.strings
     libc.include.search
-
-    libc.include.sys_epoll
 )

libc/config/linux/riscv/entrypoints.txt

@@ -178,11 +178,6 @@ set(TARGET_LIBC_ENTRYPOINTS
     # sys/auxv.h entrypoints
     libc.src.sys.auxv.getauxval
 
-    # sys/epoll.h entrypoints
-    libc.src.sys.epoll.epoll_wait
-    libc.src.sys.epoll.epoll_pwait
-    libc.src.sys.epoll.epoll_pwait2
-
     # termios.h entrypoints
     libc.src.termios.cfgetispeed
     libc.src.termios.cfgetospeed

libc/config/linux/riscv/headers.txt

@@ -29,7 +29,6 @@ set(TARGET_PUBLIC_HEADERS
     libc.include.arpa_inet
 
     libc.include.sys_auxv
-    libc.include.sys_epoll
     libc.include.sys_ioctl
     libc.include.sys_mman
     libc.include.sys_prctl

libc/config/linux/syscall_numbers.h.inc

@@ -258,10 +258,6 @@
 #define SYS_epoll_pwait __NR_epoll_pwait
 #endif
 
-#ifdef __NR_epoll_pwait2
-#define SYS_epoll_pwait2 __NR_epoll_pwait2
-#endif
-
 #ifdef __NR_epoll_wait
 #define SYS_epoll_wait __NR_epoll_wait
 #endif

libc/config/linux/x86_64/entrypoints.txt

@@ -136,11 +136,6 @@ set(TARGET_LIBC_ENTRYPOINTS
     libc.src.stdio.scanf
     libc.src.stdio.fscanf
 
-    # sys/epoll.h entrypoints
-    libc.src.sys.epoll.epoll_wait
-    libc.src.sys.epoll.epoll_pwait
-    libc.src.sys.epoll.epoll_pwait2
-
     # sys/mman.h entrypoints
     libc.src.sys.mman.madvise
     libc.src.sys.mman.mmap

libc/config/linux/x86_64/headers.txt

@@ -29,7 +29,6 @@ set(TARGET_PUBLIC_HEADERS
     libc.include.arpa_inet
 
     libc.include.sys_auxv
-    libc.include.sys_epoll
     libc.include.sys_ioctl
     libc.include.sys_mman
     libc.include.sys_prctl