[FIR] Part 2. Setup running platform checkers in tests

^KT-58881

compiler/tests-compiler-utils/tests/org/jetbrains/kotlin/fir/FirAnalyzerFacade.kt

@@ -7,8 +7,6 @@ package org.jetbrains.kotlin.fir
 
 import org.jetbrains.kotlin.KtSourceFile
 import org.jetbrains.kotlin.diagnostics.DiagnosticReporter
-import org.jetbrains.kotlin.diagnostics.DiagnosticReporterFactory
-import org.jetbrains.kotlin.diagnostics.KtDiagnostic
 import org.jetbrains.kotlin.fir.declarations.FirFile
 import org.jetbrains.kotlin.fir.pipeline.*
 import org.jetbrains.kotlin.fir.resolve.ScopeSession
@@ -19,8 +17,6 @@ abstract class AbstractFirAnalyzerFacade {
     abstract val scopeSession: ScopeSession
     abstract val result: FirResult
 
-    abstract fun runCheckers(): Map<FirFile, List<KtDiagnostic>>
-
     abstract fun runResolution(): List<FirFile>
 }
 
@@ -39,8 +35,6 @@ class FirAnalyzerFacade(
     override val result: FirResult
         get() = FirResult(listOf(ModuleCompilerAnalyzedOutput(session, scopeSession, firFiles!!)))
 
-    private var collectedDiagnostics: Map<FirFile, List<KtDiagnostic>>? = null
-
     private fun buildRawFir() {
         if (firFiles != null) return
         firFiles = when (parser) {
@@ -55,11 +49,4 @@ class FirAnalyzerFacade(
         _scopeSession = session.runResolution(firFiles!!).first
         return firFiles!!
     }
-
-    override fun runCheckers(): Map<FirFile, List<KtDiagnostic>> {
-        if (_scopeSession == null) runResolution()
-        if (collectedDiagnostics != null) return collectedDiagnostics!!
-        collectedDiagnostics = session.runCheckers(scopeSession, firFiles!!, DiagnosticReporterFactory.createPendingReporter())
-        return collectedDiagnostics!!
-    }
 }