mwan3: Simplify default configuration, mostly use defaults

Signed-off-by: James White <james@jmwhite.co.uk>

net/mwan3/files/etc/config/mwan3

@@ -1,3 +1,5 @@
+# For full documentation of mwan3 configuration:
+# https://openwrt.org/docs/guide-user/network/wan/multiwan/mwan3#mwan3_configuration
 
 config globals 'globals'
 	option mmx_mask '0x3F00'
@@ -10,15 +12,6 @@ config interface 'wan'
 	list track_ip '208.67.220.220'
 	option family 'ipv4'
 	option reliability '2'
-	option count '1'
-	option timeout '2'
-	option failure_latency '1000'
-	option recovery_latency '500'
-	option failure_loss '20'
-	option recovery_loss '5'
-	option interval '5'
-	option down '3'
-	option up '8'
 
 config interface 'wan6'
 	option enabled '0'
@@ -28,11 +21,6 @@ config interface 'wan6'
 	list track_ip '2620:0:ccc::2'
 	option family 'ipv6'
 	option reliability '2'
-	option count '1'
-	option timeout '2'
-	option interval '5'
-	option down '3'
-	option up '8'
 
 config interface 'wanb'
 	option enabled '0'
@@ -42,15 +30,6 @@ config interface 'wanb'
 	list track_ip '208.67.220.220'
 	option family 'ipv4'
 	option reliability '1'
-	option count '1'
-	option timeout '2'
-	option failure_latency '1000'
-	option recovery_latency '500'
-	option failure_loss '20'
-	option recovery_loss '5'
-	option interval '5'
-	option down '3'
-	option up '8'
 
 config interface 'wanb6'
 	option enabled '0'
@@ -60,11 +39,6 @@ config interface 'wanb6'
 	list track_ip '2620:0:ccc::2'
 	option family 'ipv6'
 	option reliability '1'
-	option count '1'
-	option timeout '2'
-	option interval '5'
-	option down '3'
-	option up '8'
 
 config member 'wan_m1_w3'
 	option interface 'wan'