doc/testnet: Omit fixed-share xmrig param where not needed

doc/src/testnet/dao.md

@@ -739,7 +739,7 @@ DarkFi DAO mining configuration address:
 Then start an `xmrig` instance to mine for the DAO:
 
 ```shell
-$ ./xmrig -u x+1 -r 1000 -R 20 -o 127.0.0.1:18347 -t {XMRIG_THREADS} -u {YOUR_DAO_WALLET_ADDRESS_MINING_CONFIGURATION}
+$ ./xmrig -r 1000 -R 20 -o 127.0.0.1:18347 -t {XMRIG_THREADS} -u {YOUR_DAO_WALLET_ADDRESS_MINING_CONFIGURATION}
 ```
 
 After your miners have successfully mined confirmed blocks, you will

doc/src/testnet/node.md

@@ -287,7 +287,7 @@ for maximum mining performance. Start `darkfid` as usual and then start
 which wallet:
 
 ```shell
-$ ./xmrig -u x+1 -r 1000 -R 20 -o 127.0.0.1:18347 -t {XMRIG_THREADS} -u {YOUR_DARKFI_WALLET_ADDRESS}
+$ ./xmrig -r 1000 -R 20 -o 127.0.0.1:18347 -t {XMRIG_THREADS} -u {YOUR_DARKFI_WALLET_ADDRESS}
 ```
 
 > Note: All miners should use the lowest possible resources so other