Remove unused field indicating availability of client classes.

src/main/java/appeng/util/Platform.java

@@ -126,8 +126,6 @@ public class Platform {
 
     public static final int DEF_OFFSET = 16;
 
-    private static final boolean CLIENT_INSTALL = FMLEnvironment.dist.isClient();
-
     /*
      * random source, use it for item drop locations...
      */
@@ -223,13 +221,6 @@ public class Platform {
         return Thread.currentThread().getThreadGroup() != SidedThreadGroups.SERVER;
     }
 
-    /*
-     * returns true if client classes are available.
-     */
-    public static boolean isClientInstall() {
-        return CLIENT_INSTALL;
-    }
-
     public static boolean hasPermissions(final DimensionalCoord dc, final PlayerEntity player) {
         if (!dc.isInWorld(player.world)) {
             return false;