i2c-tools: Remove i2c-tools, it's now in oe-core

i2c-tools was added to oe-core in commit:
32ac58819580d359e22161be1abf62215d202250

Remove it from meta-openembedded.

Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>