Remove bounded_integer.patch

Doing this since an extension of it was pushed upstream as:

https://bitbucket.org/davidstone/bounded_integer/commits/1f7c66dbb37bc287c33c87839b0d083d8f45ff32
https://bitbucket.org/davidstone/bounded_integer/commits/86d8aab3061b5ae621118861c4efe909b3387c87

As of now, no patches to bounded_integer are required anymore to compile
the tests.