update libwebp dll config

MediaBrowser.Server.Mono/Imazen.WebP.dll.config

@@ -1,6 +1,4 @@
 <configuration>
-  <dllmap dll="libwebp" target="./libwebp/linux/lib/libwebp.so" os="linux" wordsize="32"/>
-  <dllmap dll="libwebp" target="./libwebp/linux/lib64/libwebp.so" os="linux" wordsize="64"/>
   <dllmap dll="libwebp" target="./libwebp/osx/libwebp.5.dylib" os="osx"/>
-  <dllmap dll="libwebp" target="libwebp.so" os="linux" cpu="!x86,x86-64"/>
+  <dllmap dll="libwebp" target="libwebp.so" os="linux"/>
 </configuration>