How to disable vim pasting to/from system clipboard?

Basically, I need advice on how to do the opposite of what is described here:

How to make vim paste from (and copy to) system's clipboard?

I do not want vim to overwrite system clipboard when I delete something within the editor. The usual workflow for me is to select a piece of code (let us call it piece #1) with a mouse, then go to another piece of code (let us call it piece #2), select piece #2 in visual mode in vim, delete it using "c", and paste piece #1 using mouse middle button. With the new behavior, instead of pasting piece #1 I paste back piece #2.

In vim 7.2 I can do that, but in vim 7.4 I can not. I want to use 7.4 due to proper C++11 syntax highlighting but this changed default behavior is killing me.

I think, it has something to do with the "+xterm_clipboard" and/or "+clipboard" features of vim (vim --version), and I need to change them somehow to "-xterm_clipboard" and/or "-clipboard". I tried to recompile vim 7.4 with the option "--with-x=no" but somehow it did not help.

Please, help me to disable copying/pasting in vim to system clipboard by default.

Thank you!