K2: Remove a bunch of unused declarations

compiler/fir/checkers/checkers-component-generator/src/org/jetbrains/kotlin/fir/checkers/generator/diagnostics/FirDiagnosticsList.kt

@@ -1592,12 +1592,6 @@ private inline fun <reified P : PsiElement> AbstractDiagnosticGroup.exposedVisib
     return error<P>(positioningStrategy, exposedVisibilityDiagnosticInit)
 }
 
-private inline fun <reified P : PsiElement> AbstractDiagnosticGroup.exposedVisibilityWarning(
-    positioningStrategy: PositioningStrategy = PositioningStrategy.DEFAULT
-): PropertyDelegateProvider<Any?, ReadOnlyProperty<AbstractDiagnosticGroup, RegularDiagnosticData>> {
-    return warning<P>(positioningStrategy, exposedVisibilityDiagnosticInit)
-}
-
 private inline fun <reified P : PsiElement> AbstractDiagnosticGroup.exposedVisibilityDeprecationError(
     languageFeature: LanguageFeature,
     positioningStrategy: PositioningStrategy = PositioningStrategy.DEFAULT

compiler/fir/checkers/checkers-component-generator/src/org/jetbrains/kotlin/fir/checkers/generator/diagnostics/model/RegularDiagnosticData.kt

@@ -81,13 +81,10 @@ enum class PositioningStrategy(private val strategy: String? = null) {
     RETURN_WITH_LABEL,
     PROPERTY_INITIALIZER,
     WHOLE_ELEMENT,
-    INT_LITERAL_OUT_OF_RANGE,
-    FLOAT_LITERAL_OUT_OF_RANGE,
     LONG_LITERAL_SUFFIX,
     REIFIED_MODIFIER,
     TYPE_PARAMETERS_LIST,
     FUN_MODIFIER,
-    SUSPEND_MODIFIER,
     FUN_INTERFACE,
     NAME_IDENTIFIER,
     QUESTION_MARK_BY_TYPE,

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/cfa/util/DeclaredVariableCollector.kt

@@ -34,10 +34,6 @@ class DeclaredVariableCollector {
         declaredVariablesPerElement.removeKey(statement)
     }
 
-    fun resetState() {
-        declaredVariablesPerElement.clear()
-    }
-
     // FirStatement -- closest statement (loop/lambda/local declaration) which may contain reassignments
     private val visitor = object : FirVisitor<Unit, FirStatement?>() {
         override fun visitElement(element: FirElement, data: FirStatement?) {

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/FirHelpers.kt

@@ -190,16 +190,6 @@ fun CheckerContext.findClosestClassOrObject(): FirClass? {
     return null
 }
 
-/**
- * Returns the list of functions that overridden by given
- */
-fun FirSimpleFunction.overriddenFunctions(
-    containingClass: FirClassSymbol<*>,
-    context: CheckerContext,
-): List<FirFunctionSymbol<*>> {
-    return symbol.overriddenFunctions(containingClass, context)
-}
-
 fun FirNamedFunctionSymbol.overriddenFunctions(
     containingClass: FirClassSymbol<*>,
     context: CheckerContext,

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/SourceHelpers.kt

@@ -5,20 +5,11 @@
 
 package org.jetbrains.kotlin.fir.analysis.checkers
 
-import com.intellij.lang.LighterASTNode
-import com.intellij.openapi.util.Ref
-import com.intellij.util.diff.FlyweightCapableTreeStructure
 import org.jetbrains.kotlin.descriptors.Visibilities
 import org.jetbrains.kotlin.descriptors.Visibility
 import org.jetbrains.kotlin.lexer.KtModifierKeywordToken
 import org.jetbrains.kotlin.lexer.KtTokens
-import org.jetbrains.kotlin.psi.KtModifierList
-import org.jetbrains.kotlin.psi.psiUtil.visibilityModifierType
 
-/**
- * Returns the visibility by given KtModifierList
- */
-fun KtModifierList?.getVisibility() = this?.visibilityModifierType()?.toVisibilityOrNull()
 
 /**
  * Returns Visibility by token or null

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/SourceNavigator.kt

@@ -11,9 +11,9 @@ import com.intellij.psi.PsiElement
 import com.intellij.psi.PsiNameIdentifierOwner
 import com.intellij.psi.impl.source.tree.LeafPsiElement
 import org.jetbrains.kotlin.*
-import org.jetbrains.kotlin.fir.FirElement
 import org.jetbrains.kotlin.diagnostics.getAncestors
 import org.jetbrains.kotlin.diagnostics.nameIdentifier
+import org.jetbrains.kotlin.fir.FirElement
 import org.jetbrains.kotlin.fir.declarations.FirDeclaration
 import org.jetbrains.kotlin.fir.symbols.impl.FirValueParameterSymbol
 import org.jetbrains.kotlin.fir.types.FirTypeRef
@@ -54,8 +54,6 @@ interface SourceNavigator {
         }
 
         inline fun <R> FirElement.withNavigator(block: SourceNavigator.() -> R): R = with(forSource(this.source), block)
-
-        inline fun <R> KtSourceElement.withNavigator(block: SourceNavigator.() -> R): R = with(forSource(this), block)
     }
 }
 

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/declaration/declarationUtils.kt

@@ -14,8 +14,11 @@ import org.jetbrains.kotlin.fir.declarations.*
 import org.jetbrains.kotlin.fir.declarations.utils.*
 import org.jetbrains.kotlin.fir.symbols.FirBasedSymbol
 import org.jetbrains.kotlin.fir.symbols.impl.*
-import org.jetbrains.kotlin.fir.types.*
+import org.jetbrains.kotlin.fir.types.FirTypeRef
+import org.jetbrains.kotlin.fir.types.coneType
 import org.jetbrains.kotlin.fir.types.impl.FirImplicitUnitTypeRef
+import org.jetbrains.kotlin.fir.types.isNullable
+import org.jetbrains.kotlin.fir.types.typeContext
 
 internal fun isInsideExpectClass(containingClass: FirClass, context: CheckerContext): Boolean {
     return isInsideSpecificClass(containingClass, context) { klass -> klass is FirRegularClass && klass.isExpect }
@@ -90,9 +93,6 @@ internal val FirBasedSymbol<*>.isLocalMember: Boolean
         else -> false
     }
 
-internal val FirCallableDeclaration.isExtensionMember: Boolean
-    get() = symbol.isExtensionMember
-
 internal val FirCallableSymbol<*>.isExtensionMember: Boolean
     get() = resolvedReceiverTypeRef != null && dispatchReceiverType != null
 

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/expression/FirBreakOrContinueJumpsAcrossFunctionBoundaryChecker.kt

@@ -121,8 +121,4 @@ object FirBreakOrContinueJumpsAcrossFunctionBoundaryChecker : FirLoopJumpChecker
         findPathAndCheck(expression.target.labeledElement.block)
     }
 
-    private fun FirExpression.tryInline(): FirExpression {
-        val anonymousFunctionExpression = (((this as? FirLambdaArgumentExpression)?.expression) ?: this) as? FirAnonymousFunctionExpression
-        return anonymousFunctionExpression?.anonymousFunction?.body ?: this
-    }
 }

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/diagnostics/FirDiagnosticRenderers.kt

@@ -174,13 +174,4 @@ object FirDiagnosticRenderers {
     }
 
     val FUNCTIONAL_TYPE_KINDS = KtDiagnosticRenderers.COLLECTION(FUNCTIONAL_TYPE_KIND)
-
-    @Suppress("FunctionName")
-    fun <T> COLLECTION(renderer: ContextIndependentParameterRenderer<T>): ContextIndependentParameterRenderer<Collection<T>> {
-        return Renderer { list ->
-            list.joinToString(prefix = "[", postfix = "]", separator = ", ", limit = 3, truncated = "...") {
-                renderer.render(it)
-            }
-        }
-    }
 }