Is there any unbackslash-region command in emacs?

[mrf]

Hi,

When I work on long C macros I use

M-x c-backslash-region

// even makefile-backslash-region working in c-mode

after writing it but sometimes I want to convert preprocessor function
to symbolic function so I can do recursion and to do that I remove
backslashes with C-x SPC (rectangle-mark-mode).

what I'm asking for is quick command to remove this backslashes like the
comment and uncomment commands:

M-x comment-region

M-x uncomment-region