remove piq configuration, since its now the default

Reference: /n/atom/patch/applied/nopiq
Date: Wed Jun 18 13:37:07 CES 2014
Signed-off-by: quanstro@quanstro.net

# rm /sys/src/9/bcm/piq

--- /sys/src/9/bcm/mkfile	Wed Jun 18 13:37:03 2014
+++ /sys/src/9/bcm/mkfile	Wed Jun 18 13:37:04 2014
@@ -1,5 +1,5 @@
 CONF=pi
-CONFLIST=pi piq picpu
+CONFLIST=pi picpu
 
 loadaddr=0x80008000