Remove aggressive inlining attributes, fix usings

src/ImageSharp/Formats/Jxl/Fields/JxlBitsCoder.cs

@@ -1,8 +1,7 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
 
-using System.Runtime.CompilerServices;
+using SixLabors.ImageSharp.Formats.Jxl.Processing.Decoder;
-using SixLabors.ImageSharp.Formats.Jxl.IO;
 
 namespace SixLabors.ImageSharp.Formats.Jxl.Fields;
 
@@ -17,7 +16,6 @@ internal static class JxlBitsCoder
     /// </summary>
     // Looks like that's what the function does (fields.cc:406):
     // it returns whatever is passed to it.
-    [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public static int MaxEncodedBits(int bits) => bits;
 
     public static bool CanEncode(int bits, uint value, ref int encodedBits)

src/ImageSharp/Formats/Jxl/Fields/JxlF16Coder.cs

@@ -2,7 +2,7 @@
 // Licensed under the Six Labors Split License.
 
 using System.Runtime.CompilerServices;
-using SixLabors.ImageSharp.Formats.Jxl.IO;
+using SixLabors.ImageSharp.Formats.Jxl.Processing.Decoder;
 
 namespace SixLabors.ImageSharp.Formats.Jxl.Fields;
 
@@ -15,7 +15,6 @@ internal static class JxlF16Coder
     /// Always returns 16, which is the maximum possible encoded bits.
     /// The F16 coder always reads 16 bits from the bitstream.
     /// </summary>
-    [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public static int MaxEncodedBits() => 16;
 
     /// <summary>
@@ -24,7 +23,6 @@ internal static class JxlF16Coder
     /// Also stores the maximum encodeable bits into encodedBits (which is
     /// always 16).
     /// </summary>
-    [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public static bool CanEncode(float value, ref int encodedBits)
     {
         encodedBits = MaxEncodedBits();

src/ImageSharp/Formats/Jxl/Fields/JxlU32Coder.cs

@@ -1,7 +1,6 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
 
-using System.Runtime.CompilerServices;
 using SixLabors.ImageSharp.Formats.Jxl.Processing.Decoder;
 
 namespace SixLabors.ImageSharp.Formats.Jxl.Fields;
@@ -14,7 +13,6 @@ internal static class JxlU32Coder
     /// <summary>
     /// Maximum number of writeable and/or readable bits in a variable-length integer.
     /// </summary>
-    [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public static int MaxEncodedBits(in JxlU32Enc enc)
     {
         int extraBits = 0;

src/ImageSharp/Formats/Jxl/Fields/JxlU64Coder.cs

@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
 
-using SixLabors.ImageSharp.Formats.Jxl.IO;
+using SixLabors.ImageSharp.Formats.Jxl.Processing.Decoder;
 
 namespace SixLabors.ImageSharp.Formats.Jxl.Fields;