[sanitizer_common] Remove reference to obsolete termio ioctls

The termio ioctls are no longer used after commit 59978b2
("[sanitizer_common] Remove interceptors for deprecated struct termio
(llvm#137403)"), remove them.  Fixes this build error:

../../../../libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cpp:765:27: error: invalid application of ‘sizeof’ to incomplete type ‘__sanitizer::termio’
  765 |   unsigned IOCTL_TCGETA = TCGETA;
      |                           ^~~~~~
../../../../libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cpp:769:27: error: invalid application of ‘sizeof’ to incomplete type ‘__sanitizer::termio’
  769 |   unsigned IOCTL_TCSETA = TCSETA;
      |                           ^~~~~~
../../../../libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cpp:770:28: error: invalid application of ‘sizeof’ to incomplete type ‘__sanitizer::termio’
  770 |   unsigned IOCTL_TCSETAF = TCSETAF;
      |                            ^~~~~~~
../../../../libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cpp:771:28: error: invalid application of ‘sizeof’ to incomplete type ‘__sanitizer::termio’
  771 |   unsigned IOCTL_TCSETAW = TCSETAW;
      |                            ^~~~~~~

Author: andreas-schwab

compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.cpp

@@ -779,13 +779,9 @@ unsigned struct_ElfW_Phdr_sz = sizeof(Elf_Phdr);
   unsigned IOCTL_SOUND_PCM_WRITE_FILTER = SOUND_PCM_WRITE_FILTER;
 #endif // SOUND_VERSION
   unsigned IOCTL_TCFLSH = TCFLSH;
-  unsigned IOCTL_TCGETA = TCGETA;
   unsigned IOCTL_TCGETS = TCGETS;
   unsigned IOCTL_TCSBRK = TCSBRK;
   unsigned IOCTL_TCSBRKP = TCSBRKP;
-  unsigned IOCTL_TCSETA = TCSETA;
-  unsigned IOCTL_TCSETAF = TCSETAF;
-  unsigned IOCTL_TCSETAW = TCSETAW;
   unsigned IOCTL_TCSETS = TCSETS;
   unsigned IOCTL_TCSETSF = TCSETSF;
   unsigned IOCTL_TCSETSW = TCSETSW;

compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.h

@@ -1311,13 +1311,9 @@ extern unsigned IOCTL_SNDCTL_COPR_SENDMSG;
 extern unsigned IOCTL_SNDCTL_COPR_WCODE;
 extern unsigned IOCTL_SNDCTL_COPR_WDATA;
 extern unsigned IOCTL_TCFLSH;
-extern unsigned IOCTL_TCGETA;
 extern unsigned IOCTL_TCGETS;
 extern unsigned IOCTL_TCSBRK;
 extern unsigned IOCTL_TCSBRKP;
-extern unsigned IOCTL_TCSETA;
-extern unsigned IOCTL_TCSETAF;
-extern unsigned IOCTL_TCSETAW;
 extern unsigned IOCTL_TCSETS;
 extern unsigned IOCTL_TCSETSF;
 extern unsigned IOCTL_TCSETSW;