samples/net: civetweb: Remove SOC_SERIES_SAME70=y in prj.cnf

For some reasons SOC_SERIES_SAME70 was selected in civetweb sample,
which prevents build on other platforms.
This issue was silent since sample yaml file limits sample testing on
sam_e70_xplained.

Signed-off-by: Erwan Gouriou <[email protected]>

Author: erwango

samples/net/sockets/civetweb/prj.conf

@@ -19,7 +19,6 @@ CONFIG_NET_RX_STACK_SIZE=8192
 CONFIG_ISR_STACK_SIZE=8192
 CONFIG_MAIN_STACK_SIZE=8192
 CONFIG_IDLE_STACK_SIZE=2048
-CONFIG_SOC_SERIES_SAME70=y
 
 CONFIG_DNS_RESOLVER=y