Revert "Switch TypeApplications to extensions for import"

This reverts commit 9b02d6a.

Author: som-snytt

compiler/src/dotty/tools/backend/jvm/BCodeBodyBuilder.scala

@@ -16,7 +16,6 @@ import dotty.tools.dotc.CompilationUnit
 import dotty.tools.dotc.core.Constants.*
 import dotty.tools.dotc.core.Flags.{Label => LabelFlag, _}
 import dotty.tools.dotc.core.Types.*
-import dotty.tools.dotc.core.TypeApplications.*
 import dotty.tools.dotc.core.StdNames.{nme, str}
 import dotty.tools.dotc.core.Symbols.*
 import dotty.tools.dotc.transform.Erasure

compiler/src/dotty/tools/backend/jvm/BCodeSkelBuilder.scala

@@ -17,7 +17,6 @@ import dotty.tools.dotc.core.NameKinds.*
 import dotty.tools.dotc.core.Names.TermName
 import dotty.tools.dotc.core.Symbols.*
 import dotty.tools.dotc.core.Types.*
-import dotty.tools.dotc.core.TypeApplications.*
 import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.dotc.util.Spans.*
 import dotty.tools.dotc.report

compiler/src/dotty/tools/debug/ExtractExpression.scala

@@ -8,7 +8,6 @@ import dotty.tools.dotc.core.Flags.*
 import dotty.tools.dotc.core.Names.*
 import dotty.tools.dotc.core.Symbols.*
 import dotty.tools.dotc.core.Types.*
-import dotty.tools.dotc.core.TypeApplications.*
 import dotty.tools.dotc.core.DenotTransformers.DenotTransformer
 import dotty.tools.dotc.core.Denotations.SingleDenotation
 import dotty.tools.dotc.core.SymDenotations.SymDenotation

compiler/src/dotty/tools/debug/ResolveReflectEval.scala

@@ -12,7 +12,6 @@ import dotty.tools.dotc.core.StdNames.*
 import dotty.tools.dotc.core.Symbols.*
 import dotty.tools.dotc.core.TypeErasure.ErasedValueType
 import dotty.tools.dotc.core.Types.*
-import dotty.tools.dotc.core.TypeApplications.*
 import dotty.tools.dotc.report
 import dotty.tools.dotc.transform.MegaPhase.MiniPhase
 import dotty.tools.dotc.transform.ValueClasses

compiler/src/dotty/tools/dotc/ast/Desugar.scala

@@ -4,7 +4,6 @@ package ast
 
 import core.*
 import util.Spans.*, Types.*, Contexts.*, Constants.*, Names.*, NameOps.*, Flags.*
-import TypeApplications.*
 import Symbols.*, StdNames.*, Trees.*, ContextOps.*
 import Decorators.*
 import Annotations.Annotation

compiler/src/dotty/tools/dotc/ast/DesugarEnums.scala

@@ -4,7 +4,6 @@ package ast
 
 import core.*
 import util.Spans.*, Types.*, Contexts.*, Constants.*, Names.*, Flags.*
-import TypeApplications.*
 import Symbols.*, StdNames.*, Trees.*
 import Decorators.*
 import util.{Property, SourceFile}

compiler/src/dotty/tools/dotc/ast/MainProxies.scala

@@ -3,7 +3,6 @@ package ast
 
 import core.*
 import Symbols.*, Types.*, Contexts.*, Decorators.*, util.Spans.*, Flags.*, Constants.*
-import TypeApplications.*
 import StdNames.{nme, tpnme}
 import ast.Trees.*
 import Names.Name

compiler/src/dotty/tools/dotc/ast/TreeInfo.scala

@@ -4,7 +4,6 @@ package ast
 
 import core.*
 import Flags.*, Trees.*, Types.*, Contexts.*
-import TypeApplications.*
 import Names.*, StdNames.*, NameOps.*, Symbols.*
 import Annotations.Annotation
 import NameKinds.ContextBoundParamName

compiler/src/dotty/tools/dotc/ast/TreeTypeMap.scala

@@ -4,7 +4,6 @@ package ast
 
 import core.*
 import Types.*, Contexts.*, Flags.*
-import TypeApplications.*
 import Symbols.*, Annotations.*, Trees.*, Symbols.*, Constants.Constant
 import Decorators.*
 

compiler/src/dotty/tools/dotc/ast/Trees.scala

@@ -4,7 +4,6 @@ package ast
 
 import core.*
 import Types.*, Names.*, NameOps.*, Flags.*, util.Spans.*, Contexts.*, Constants.*
-import TypeApplications.*
 import typer.{ ConstFold, ProtoTypes }
 import SymDenotations.*, Symbols.*, Denotations.*, StdNames.*, Comments.*
 import collection.mutable.ListBuffer