Remove SafeHandle as referencing it does nothing

src/Tgstation.Server.Host/System/Process.cs

@@ -42,12 +42,6 @@ namespace Tgstation.Server.Host.System
 		/// </summary>
 		readonly CancellationTokenSource readerCts;
 
-		/// <summary>
-		/// The <see cref="global::System.Diagnostics.Process.SafeHandle"/>.
-		/// </summary>
-		/// <remarks>We keep this to prevent .NET from closing the real handle too soon. See https://stackoverflow.com/a/47656845</remarks>
-		readonly SafeProcessHandle safeHandle;
-
 		/// <summary>
 		/// The <see cref="Task{TResult}"/> resulting in the process' standard output/error text.
 		/// </summary>
@@ -75,7 +69,6 @@ namespace Tgstation.Server.Host.System
 			this.handle = handle ?? throw new ArgumentNullException(nameof(handle));
 
 			// Do this fast because the runtime will bitch if we try to access it after it ends
-			safeHandle = handle.SafeHandle;
 			Id = handle.Id;
 
 			this.readerCts = readerCts;
@@ -122,7 +115,6 @@ namespace Tgstation.Server.Host.System
 			if (readTask != null)
 				await readTask;
 
-			safeHandle.Dispose();
 			handle.Dispose();
 		}