do not show unused block on `send` #61

Job	Run time
make (test, --parser=prism, -v --tty=no, 30)	4m 45s
make (test-all, --parser=prism, -q --tty=no --excludes-dir="../src/test/.excludes-prism" --exclud...	7m 59s
make (test-spec, --parser=prism, -T --parser=prism, 10)	4m 28s
make (test-tool, --parser=prism, -v --tty=no, 30)	3m 45s
make (test-bundler-parallel, --parser=prism, -v --tty=no, 40)	43m 45s
make (test-bundled-gems, --parser=prism, -v --tty=no, 30)	20m 7s
make (test-syntax-suggest, --parser=prism, -v --tty=no, 30)	3m 59s
	1h 28m 48s

Provide feedback