[FIR] Get rid of FirSymbolProvider.getAllCallableNamesInPackage

#KT-41048

idea/idea-frontend-fir/idea-fir-low-level-api/src/org/jetbrains/kotlin/idea/fir/low/level/api/providers/FirIdeProvider.kt

@@ -130,15 +130,6 @@ internal class FirIdeProvider(
         override fun getClassLikeSymbolByFqName(classId: ClassId): FirClassLikeSymbol<*>? {
             return getFirClassifierByFqName(classId)?.symbol
         }
-
-        // TODO this should be reworked because [FirIdeProvider] should not have such method
-        // used only in completion
-        override fun getAllCallableNamesInPackage(fqName: FqName): Set<Name> {
-            return hashSetOf<Name>().apply {
-                indexHelper.getTopLevelPropertiesInPackage(fqName).mapNotNullTo(this) { it.nameAsName }
-                indexHelper.getTopLevelFunctionsInPackage(fqName).mapNotNullTo(this) { it.nameAsName }
-            }
-        }
     }
 }
 

idea/idea-frontend-fir/src/org/jetbrains/kotlin/idea/frontend/api/fir/scopes/KtFirPackageScope.kt

@@ -28,7 +28,8 @@ internal class KtFirPackageScope(
     private val provider get() = firScope.session.firSymbolProvider
 
     override fun getCallableNames(): Set<Name> = withValidityAssertion {
-        provider.getAllCallableNamesInPackage(fqName)
+        // TODO: KT-41048
+        emptySet()
     }
 
     override fun getClassLikeSymbolNames(): Set<Name> = withValidityAssertion {