Remove unused PluginOperationResult enum

Dalamud/Plugin/Internal/Types/PluginOperationResult.cs

@@ -1,57 +0,0 @@
-using System;
-
-namespace Dalamud.Plugin.Internal.Types
-{
-    /// <summary>
-    /// This represents the result of a an operation taken against a plugin.
-    /// Loading, unloading, installation, etc.
-    /// </summary>
-    internal enum PluginOperationResult
-    {
-        /// <summary>
-        /// The result is unknown. Should not be used.
-        /// </summary>
-        [Obsolete("Do not use this", error: true)]
-        Unknown,
-
-        /// <summary>
-        /// The result is pending. Take a seat and wait.
-        /// </summary>
-        Pending,
-
-        /// <summary>
-        /// The operation was successful.
-        /// </summary>
-        Success,
-
-        /// <summary>
-        /// During the plugin operation, an unexpected error occurred.
-        /// </summary>
-        UnknownError,
-
-        /// <summary>
-        /// The plugin state was invalid for the attempted operation.
-        /// </summary>
-        InvalidState,
-
-        /// <summary>
-        /// The plugin applicable version is not compativle with the currently running game.
-        /// </summary>
-        InvalidGameVersion,
-
-        /// <summary>
-        /// The plugin API level is not compatible with the currently running Dalamud.
-        /// </summary>
-        InvalidApiLevel,
-
-        /// <summary>
-        /// During loading, the current plugin was marked as disabled.
-        /// </summary>
-        InvalidStateDisabled,
-
-        /// <summary>
-        /// During loading, another plugin was detected with the same internal name.
-        /// </summary>
-        InvalidStateDuplicate,
-    }
-}