Remove vanished translation junk

res/silentdragon_uk.ts

@@ -1885,10 +1885,6 @@ You either have unconfirmed funds or the balance is too low for an automatic mig
         <source>No HUSH price was available to convert from USD</source>
         <translation type="obsolete">Цена HUSH для конвертации в USD недоступна</translation>
     </message>
-    <message>
-        <source>No ZEC price was available to convert from USD</source>
-        <translation type="vanished">Ціна HUSH недоступна для конвертації в USD</translation>
-    </message>
     <message>
         <source>Computing Recurring Tx: </source>
         <translation type="vanished">Обчислений повторюючий Tx: </translation>

res/silentdragon_zh.ts

@@ -2151,10 +2151,6 @@ You either have unconfirmed funds or the balance is too low for an automatic mig
         <source>Request payment from a Sapling address. You&apos;ll send a HUSH 0.0001 transaction to the address with a HUSH payment URI. The memo will be included in the transaction when the address pays you.</source>
         <translation type="unfinished"></translation>
     </message>
-    <message>
-        <source>Request payment from a Sapling address. You&apos;ll send a HUSH 0.0001 transaction to the address with a hush payment URI. The memo will be included in the transaction when the address pays you.</source>
-        <translation type="vanished">要求从树苗地址付款。 您将使用hush支付URI将ZEC 0.0001交易发送到该地址。 当地址付款时，备注将包含在交易中。</translation>
-    </message>
     <message>
         <source>Error paying hush URI</source>
         <translation type="vanished">支付hush URI时出错</translation>
@@ -2623,14 +2619,6 @@ You either have unconfirmed funds or the balance is too low for an automatic mig
         <source>MB</source>
         <translation type="unfinished"></translation>
     </message>
-    <message>
-        <source>Connect to the internet to fetch ZEC prices</source>
-        <translation type="vanished">连接到互联网以获取ZEC价格</translation>
-    </message>
-    <message>
-        <source>Fetch ZEC / USD prices</source>
-        <translation type="vanished">获取 ZEC/USD 价格</translation>
-    </message>
     <message>
         <location filename="../src/settings.ui" line="731"/>
         <source>Troubleshooting</source>
@@ -2884,10 +2872,6 @@ You either have unconfirmed funds or the balance is too low for an automatic mig
         <source>Show Advanced Configuration</source>
         <translation>显示高级配置</translation>
     </message>
-    <message>
-        <source>Allow connections to the internet to check for updates, get ZEC/USD prices etc...</source>
-        <translation type="vanished">允许连接到互联网检查更新，获得ZEC/USD价格等…</translation>
-    </message>
     <message>
         <location filename="../src/createzcashconfdialog.ui" line="14"/>
         <source>Configure HUSH3.conf</source>