[sanitizer_common] Remove reference to obsolete termio ioctls (#138822)

[sanitizer_common] Remove reference to obsolete termio ioctls (#138822)

Cherry picked from LLVM commit c99b1bcd505064f2e086e6b1034ce0b0c91ea5b9.

The termio ioctls are no longer used after commit 59978b21ad9c
("[sanitizer_common] Remove interceptors for deprecated struct termio
(#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;
      |                            ^~~~~~~

(cherry picked from commit dbe0ba6c90d53229613c7eb3f476580ae1b9aae1)