Removing System.Drawing.Common dependency

Author: MajMcCloud

TelegramBotBase/TelegramBotBase.nuspec

@@ -14,12 +14,10 @@
     <dependencies>
       <group targetFramework=".NETFramework4.6.1">
         <dependency id="Newtonsoft.Json" version="13.0.1" exclude="Build,Analyzers" />
-        <dependency id="System.Drawing.Common" version="4.6.0" exclude="Build,Analyzers" />
         <dependency id="Telegram.Bot" version="19.0.0" exclude="Build,Analyzers" />
       </group>
       <group targetFramework=".NETStandard2.0">
         <dependency id="Newtonsoft.Json" version="13.0.1" exclude="Build,Analyzers" />
-        <dependency id="System.Drawing.Common" version="4.6.0" exclude="Build,Analyzers" />
         <dependency id="Telegram.Bot" version="19.0.0" exclude="Build,Analyzers" />
       </group>
     </dependencies>