Remove fzf bash completion (for performance)
Remove fzf bash completion (for performance)

It seems to speed up loading of a fresh bash prompt quite significantly.
Given that I never use fzf completion, might as well disable it.

Some quick time tests:

```
$ time for i in $(seq 1 500); do source ~/.bashrc; done # With fzf completion

real    0m20.146s
user    0m13.543s
sys     0m8.248s

$ time for i in $(seq 1 500); do source ~/.bashrc; done # Without fzf completion

real    0m11.467s
user    0m6.516s
sys     0m3.741s
```

davidxmoody/dotfiles,davidxmoody/dotfiles,davidxmoody/dotfiles,davidxmoody/dotfiles