bbclass: bb.fatal() clean up

bbclass: bb.fatal() clean up

The bb.fatal() is defined as:

def fatal(*args):
    logger.critical(''.join(args))
    sys.exit(1)

So anything after bb.fatal() in the same code block doesn't have any
effect, e.g.:

    bb.fatal("%s_%s: %s" % (var, pkg, e))
    raise e

The "raise e" should be removed.

I searched all the files which use bb.fatal(), only the following 3
classes have this issues:

  insane.bbclass
  package.bbclass
  package_rpm.bbclass

[YOCTO #4461]

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>