remove superfluous attributes

src/_common/Quotes/Quote.Converters.cs

@@ -1,5 +1,3 @@
-using System.ComponentModel;
-
 namespace Skender.Stock.Indicators;
 
 // QUOTE UTILITIES (CONVERTERS)
@@ -8,8 +6,7 @@ public static partial class Quotes
 {
     /* LISTS */
 
-    // convert TQuote type list to built-in Quote type list
-    [Category("Public API only")]
+    // convert TQuote type list to built-in Quote type list (public API only)
     public static IReadOnlyList<Quote> ToQuoteList<TQuote>(
         this IReadOnlyList<TQuote> quotes)
         where TQuote : IQuote
@@ -30,8 +27,7 @@ internal static List<QuoteD> ToQuoteDList<TQuote>(
 
     /* TYPES */
 
-    // convert any IQuote type to native Quote type
-    [Category("Public API only")]
+    // convert any IQuote type to native Quote type (public API only)
     public static Quote ToQuote<TQuote>(this TQuote quote)
         where TQuote : IQuote
 

src/s-z/Sma/Sma.Utilities.cs

@@ -1,4 +1,3 @@
-using System.ComponentModel;
 using System.Diagnostics.CodeAnalysis;
 using System.Numerics;
 
@@ -24,8 +23,7 @@ public static partial class Sma
     /// if incalculable <see langword="double.NaN"/>
     /// values are in range.
     /// </returns>
-    [Category("Public API only")]
-    public static double? Average<T>(
+    public static double? Average<T>(  // public API only
         this IReadOnlyList<T> values,
         int lookbackPeriods,
         int? endIndex = null)
@@ -73,8 +71,7 @@ internal static double Increment<T>(
         // TODO: apply this SMA increment method more widely in other indicators (see EMA example)
     }
 
-    [ExcludeFromCodeCoverage]
-    [Category("Experimental")]
+    [ExcludeFromCodeCoverage]  // experimental SIMD code
     internal static double[] Increment(this double[] prices, int period)
     {
         // TODO: remove/consider experiment, has rounding errors