sphinx: remove texinfo files

gcc/d/ChangeLog:

	* gdc.texi: Removed.

gcc/ChangeLog:

	* doc/analyzer.texi: Removed.
	* doc/avr-mmcu.texi: Removed.
	* doc/bugreport.texi: Removed.
	* doc/cfg.texi: Removed.
	* doc/collect2.texi: Removed.
	* doc/compat.texi: Removed.
	* doc/configfiles.texi: Removed.
	* doc/configterms.texi: Removed.
	* doc/contrib.texi: Removed.
	* doc/contribute.texi: Removed.
	* doc/cpp.texi: Removed.
	* doc/cppdiropts.texi: Removed.
	* doc/cppenv.texi: Removed.
	* doc/cppinternals.texi: Removed.
	* doc/cppopts.texi: Removed.
	* doc/cppwarnopts.texi: Removed.
	* doc/extend.texi: Removed.
	* doc/fragments.texi: Removed.
	* doc/frontends.texi: Removed.
	* doc/gcc.texi: Removed.
	* doc/gccint.texi: Removed.
	* doc/gcov-dump.texi: Removed.
	* doc/gcov-tool.texi: Removed.
	* doc/gcov.texi: Removed.
	* doc/generic.texi: Removed.
	* doc/gimple.texi: Removed.
	* doc/gnu.texi: Removed.
	* doc/gty.texi: Removed.
	* doc/headerdirs.texi: Removed.
	* doc/hostconfig.texi: Removed.
	* doc/implement-c.texi: Removed.
	* doc/implement-cxx.texi: Removed.
	* doc/include/fdl.texi: Removed.
	* doc/include/funding.texi: Removed.
	* doc/include/gcc-common.texi: Removed.
	* doc/include/gpl_v3.texi: Removed.
	* doc/install.texi: Removed.
	* doc/interface.texi: Removed.
	* doc/invoke.texi: Removed.
	* doc/languages.texi: Removed.
	* doc/libgcc.texi: Removed.
	* doc/loop.texi: Removed.
	* doc/lto-dump.texi: Removed.
	* doc/lto.texi: Removed.
	* doc/makefile.texi: Removed.
	* doc/match-and-simplify.texi: Removed.
	* doc/md.texi: Removed.
	* doc/objc.texi: Removed.
	* doc/optinfo.texi: Removed.
	* doc/options.texi: Removed.
	* doc/passes.texi: Removed.
	* doc/plugins.texi: Removed.
	* doc/poly-int.texi: Removed.
	* doc/portability.texi: Removed.
	* doc/rtl.texi: Removed.
	* doc/service.texi: Removed.
	* doc/sourcebuild.texi: Removed.
	* doc/standards.texi: Removed.
	* doc/tm.texi: Removed.
	* doc/tree-ssa.texi: Removed.
	* doc/trouble.texi: Removed.
	* doc/ux.texi: Removed.
	* doc/tm.texi.in: Removed.

gcc/fortran/ChangeLog:

	* gfc-internals.texi: Removed.
	* gfortran.texi: Removed.
	* intrinsic.texi: Removed.
	* invoke.texi: Removed.

gcc/go/ChangeLog:

	* gccgo.texi: Removed.

libgomp/ChangeLog:

	* libgomp.texi: Removed.

libiberty/ChangeLog:

	* at-file.texi: Removed.
	* copying-lib.texi: Removed.
	* functions.texi: Removed.
	* libiberty.texi: Removed.
	* obstacks.texi: Removed.

libitm/ChangeLog:

	* libitm.texi: Removed.

libquadmath/ChangeLog:

	* libquadmath.texi: Removed.