Revert "sphinx: add missing newline for conf.py files."

gcc/d/doc/conf.py

gcc/doc/cpp/conf.py

gcc/doc/cppinternals/conf.py

gcc/doc/gcc/conf.py

gcc/doc/gccint/conf.py

gcc/doc/install/conf.py

gcc/fortran/doc/gfc-internals/conf.py

gcc/fortran/doc/gfortran/conf.py

gcc/go/doc/conf.py

libgomp/doc/conf.py

libiberty/doc/conf.py

libitm/doc/conf.py

libquadmath/doc/conf.py