Remove FSharp.Compiler.AbstractIL.IL opens. (#15493)

Author: nojaf

src/Compiler/SyntaxTree/PrettyNaming.fs

@@ -10,7 +10,6 @@ open System.Collections.Concurrent
 open System.Globalization
 open System.Text
 
-open FSharp.Compiler.AbstractIL
 open Internal.Utilities.Library
 open FSharp.Compiler.Text
 open FSharp.Compiler.Text.Layout

src/Compiler/SyntaxTree/XmlDoc.fs

@@ -13,7 +13,6 @@ open FSharp.Compiler.DiagnosticsLogger
 open FSharp.Compiler.IO
 open FSharp.Compiler.Text
 open FSharp.Compiler.Text.Range
-open FSharp.Compiler.AbstractIL.IL
 
 /// Represents collected XmlDoc lines
 [<RequireQualifiedAccess>]

src/Compiler/SyntaxTree/XmlDoc.fsi

@@ -3,7 +3,6 @@
 namespace FSharp.Compiler.Xml
 
 open FSharp.Compiler.Text
-open FSharp.Compiler.AbstractIL.IL
 
 /// Represents collected XmlDoc lines
 [<Class>]