Alright, before I say anything else I must say (as usual) YOU DO THIS AT YOUR OWN RISK. If you brick your phone, it's not my fault that you decided to use this and don't say I didn't warn you.
That being said, I've attached a BlurCamera.apk app with the call to ToneGenerator during focusing removed. I had to decompile and recompile the resources, so this wasn't a simple "swap a byte" or "remove a file" hack. I haven't tested every little tiny feature, but from basic use it all seems to be working.
** You must be rooted to do this. **
To install:
First, rename BlurCamera.zip to BlurCamera.apk.
Copy the apk to your SD card with your preferred method.
Launch Root Manager. It's worth it to just buy the app if you haven't already. I grew up with DOS so I'm no stranger to command lines, but I'm not listing every single command line command to do this here. If someone else wants to list it for people to use Terminal instead, thank you.
Ensure that /system/app is mouned R/W (read/write). There's a button for it at the top right in Root Manager to toggle it.
Move /system/app/BlurCamera.apk to your SD card somewhere in /sdcard. THIS IS THE BACKUP OF YOUR ORIGINAL CAMERA APP THAT YOU WILL LIKELY NEED TO RESTORE BEFORE DOING AN OTA UPDATE. Also, don't be stupid and overwrite the one you just copied to the SD card, otherwise you're accomplishing nothing. Put it in a different directory.
Move the BlurCamera.apk file from where you put it on your SD card to /system/app.
Set permissions on BlurCamera.apk to rw-r--r--. This is User R/W, Group R, Others R. As of the current version of Root Manager this is checking the first two in row one, the first in row two and the first in row three. The rest are unchecked. Since this is standard Linux permisions, it won't likely change, but in case it does just make sure you're checking off the right ones and make sure you end up with rw-r--r-- when you are finished.
Reboot.
Enjoy.