Removing the Vector*_Intrinsics.cs file, regions from the numerics co…

…de, and normalizing the member order (#41898)

* Removing the Vector*_Intrinsics.cs file, regions from the numerics code, and normalizing the member order

* Updating the doc comment for Quaternion

src/libraries/System.Private.CoreLib/src/System.Private.CoreLib.Shared.projitems

@@ -29,17 +29,10 @@
   <ItemGroup>
     <ILLinkSubstitutionsXmls Include="$(ILLinkSharedDirectory)ILLink.Substitutions.Shared.xml" />
     <!-- TODO: Enable these substitutions files for more platforms once https://github.com/mono/linker/issues/1260 is fixed -->
-    <ILLinkSubstitutionsXmls Include="$(ILLinkSharedDirectory)ILLink.Substitutions.LittleEndian.xml"
-                             Condition="'$(Platform)' == 'wasm'" />
-
-    <ILLinkSubstitutionsXmls Include="$(ILLinkSharedDirectory)ILLink.Substitutions.32bit.xml"
-                             Condition="'$(Platform)' == 'wasm'" />
-
-    <ILLinkSubstitutionsXmls Include="$(ILLinkSharedDirectory)ILLink.Substitutions.NoArmIntrinsics.xml"
-                             Condition="'$(Platform)' == 'wasm'" />
-    <ILLinkSubstitutionsXmls Include="$(ILLinkSharedDirectory)ILLink.Substitutions.NoX86Intrinsics.xml"
-                             Condition="'$(Platform)' == 'wasm'" />
-
+    <ILLinkSubstitutionsXmls Include="$(ILLinkSharedDirectory)ILLink.Substitutions.LittleEndian.xml" Condition="'$(Platform)' == 'wasm'" />
+    <ILLinkSubstitutionsXmls Include="$(ILLinkSharedDirectory)ILLink.Substitutions.32bit.xml" Condition="'$(Platform)' == 'wasm'" />
+    <ILLinkSubstitutionsXmls Include="$(ILLinkSharedDirectory)ILLink.Substitutions.NoArmIntrinsics.xml" Condition="'$(Platform)' == 'wasm'" />
+    <ILLinkSubstitutionsXmls Include="$(ILLinkSharedDirectory)ILLink.Substitutions.NoX86Intrinsics.xml" Condition="'$(Platform)' == 'wasm'" />
     <ILLinkLinkAttributesXmls Include="$(ILLinkSharedDirectory)ILLink.LinkAttributes.Shared.xml" />
   </ItemGroup>
   <ItemGroup>
@@ -467,11 +460,8 @@
     <Compile Include="$(MSBuildThisFileDirectory)System\Numerics\Plane.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Numerics\Quaternion.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Numerics\Vector2.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)System\Numerics\Vector2_Intrinsics.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Numerics\Vector3.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)System\Numerics\Vector3_Intrinsics.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Numerics\Vector4.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)System\Numerics\Vector4_Intrinsics.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Numerics\VectorMath.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Object.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\ObjectDisposedException.cs" />
@@ -1977,4 +1967,4 @@
     <Compile Include="$(MSBuildThisFileDirectory)System\Text\Utf8Span.Searching.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Text\Utf8StringComparer.cs" />
   </ItemGroup>
-</Project>
+</Project>