Remove more thin wrappers

src/binary/history.rs

src/binary/lexer.rs

src/lib/builtins/helpers.rs

src/lib/builtins/mod.rs

src/lib/builtins/test.rs

src/lib/builtins/variables.rs

src/lib/expansion/words/mod.rs

src/lib/shell/mod.rs

src/lib/shell/pipe_exec/foreground.rs

src/lib/shell/pipe_exec/job_control.rs

src/lib/shell/shell_expand.rs