Refactor: Remove unnecessary using directives across multiple files

- Cleaned up code by removing unused using directives from various test and implementation files in the trends and volume directories.
- This includes files related to HMA, HTIT, JMA, KAMA, LSMA, MAMA, MGDI, PWMA, RMA, SMA, SSF, SUPER, T3, TEMA, TRIMA, USF, VIDYA, WMA, ATR, ADL, and ADOSC.
- Improved code readability and maintainability by streamlining imports.

lib/core/tbarseries/tbarseries.cs

@@ -1,6 +1,4 @@
-using System;
 using System.Collections;
-using System.Collections.Generic;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
@@ -279,4 +277,4 @@ public class TBarSeries : IReadOnlyList<TBar>
 
     IEnumerator<TBar> IEnumerable<TBar>.GetEnumerator() => GetEnumerator();
     IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
-}
+}