* MAINTAINERS: Remove chill maintainers.

* MAINTAINERS: Remove chill maintainers.
* Makefile.in (CHILLFLAGS): Remove.
(CHILL_LIB): Remove.
(TARGET_CONFIGDIRS): Remove libchill.
(CHILL_FOR_TARGET): Remove.
(BASE_FLAGS_TO_PASS): Don't pass CHILLFLAGS, CHILL_FOR_TARGET, or
CHILL_LIB.
(CONFIGURE_TARGET_MODULES): Remove configure-target-libchill.
(CHECK_TARGET_MODULES): Likewise.
(INSTALL_TARGET_MODULES): Likewise.
(CLEAN_TARGET_MODULES): Likewise.
(configure-target-libchill): Remove.
(all-target-libchill): Remove.
* configure.in (target_libs): Remove target-libchill.
Do not compute CHILL_FOR_TARGET.
* libchill: Remove directory.