[FIR] Get rid of useless methods in FirSymbolProvider

compiler/fir/java/src/org/jetbrains/kotlin/fir/java/deserialization/KotlinDeserializedJvmSymbolsProvider.kt

@@ -417,26 +417,8 @@ class KotlinDeserializedJvmSymbolsProvider(
             ?.getClasses { true }.orEmpty()
             .mapTo(sortedSetOf(), JavaClass::name)
 
-    private fun getClassDeclarations(classId: ClassId): List<FirDeclaration> {
-        return findRegularClass(classId)?.declarations ?: emptyList()
-    }
-
-
     private fun findRegularClass(classId: ClassId): FirRegularClass? =
         getClassLikeSymbolByFqName(classId)?.fir as? FirRegularClass
 
-    override fun getAllCallableNamesInClass(classId: ClassId): Set<Name> =
-        getClassDeclarations(classId).mapNotNullTo(mutableSetOf()) {
-            when (it) {
-                is FirSimpleFunction -> it.name
-                is FirVariable<*> -> it.name
-                else -> null
-            }
-        }
-
-    override fun getNestedClassesNamesInClass(classId: ClassId): Set<Name> {
-        return getClassDeclarations(classId).filterIsInstance<FirRegularClass>().mapTo(mutableSetOf()) { it.name }
-    }
-
     override fun getPackage(fqName: FqName): FqName? = null
 }

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/providers/FirSymbolProvider.kt

@@ -51,9 +51,6 @@ abstract class FirSymbolProvider : FirSessionComponent {
     open fun getAllCallableNamesInPackage(fqName: FqName): Set<Name> = emptySet()
     open fun getClassNamesInPackage(fqName: FqName): Set<Name> = emptySet()
 
-    open fun getAllCallableNamesInClass(classId: ClassId): Set<Name> = emptySet()
-    open fun getNestedClassesNamesInClass(classId: ClassId): Set<Name> = emptySet()
-
     abstract fun getPackage(fqName: FqName): FqName? // TODO: Replace to symbol sometime
 }
 

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/providers/impl/FirBuiltinSymbolProvider.kt

@@ -267,24 +267,6 @@ class FirBuiltinSymbolProvider(val session: FirSession, val kotlinScopeProvider:
         } ?: emptySet()
     }
 
-    override fun getAllCallableNamesInClass(classId: ClassId): Set<Name> {
-        return getClassDeclarations(classId).mapNotNullTo(mutableSetOf()) {
-            when (it) {
-                is FirSimpleFunction -> it.name
-                is FirVariable<*> -> it.name
-                else -> null
-            }
-        }
-    }
-
-    override fun getNestedClassesNamesInClass(classId: ClassId): Set<Name> {
-        return getClassDeclarations(classId).filterIsInstance<FirRegularClass>().mapTo(mutableSetOf()) { it.name }
-    }
-
-    private fun getClassDeclarations(classId: ClassId): List<FirDeclaration> {
-        return findRegularClass(classId)?.declarations ?: emptyList()
-    }
-
     private fun findRegularClass(classId: ClassId): FirRegularClass? =
         getClassLikeSymbolByFqName(classId)?.fir
 

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/providers/impl/FirCompositeSymbolProvider.kt

@@ -38,12 +38,4 @@ class FirCompositeSymbolProvider(val providers: List<FirSymbolProvider>) : FirSy
     override fun getClassNamesInPackage(fqName: FqName): Set<Name> {
         return providers.flatMapTo(mutableSetOf()) { it.getClassNamesInPackage(fqName) }
     }
-
-    override fun getAllCallableNamesInClass(classId: ClassId): Set<Name> {
-        return providers.flatMapTo(mutableSetOf()) { it.getAllCallableNamesInClass(classId) }
-    }
-
-    override fun getNestedClassesNamesInClass(classId: ClassId): Set<Name> {
-        return providers.flatMapTo(mutableSetOf()) { it.getNestedClassesNamesInClass(classId) }
-    }
 }

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/providers/impl/FirDependenciesSymbolProviderImpl.kt

@@ -65,12 +65,4 @@ open class FirDependenciesSymbolProviderImpl(val session: FirSession) : Abstract
     override fun getClassNamesInPackage(fqName: FqName): Set<Name> {
         return dependencyProviders.flatMapTo(mutableSetOf()) { it.getClassNamesInPackage(fqName) }
     }
-
-    override fun getAllCallableNamesInClass(classId: ClassId): Set<Name> {
-        return dependencyProviders.flatMapTo(mutableSetOf()) { it.getAllCallableNamesInClass(classId) }
-    }
-
-    override fun getNestedClassesNamesInClass(classId: ClassId): Set<Name> {
-        return dependencyProviders.flatMapTo(mutableSetOf()) { it.getNestedClassesNamesInClass(classId) }
-    }
 }