[Analysis API] use existing test utilities for rendering

analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/components/KtFirSymbolDeclarationRendererProvider.kt

@@ -33,23 +33,6 @@ internal class KtFirSymbolDeclarationRendererProvider(
         return ConeTypeIdeRenderer(analysisSession.firResolveSession.useSiteFirSession, options).renderType(type.coneType)
     }
 
-    override fun render(signature: KtCallableSignature<*>, options: KtDeclarationRendererOptions): String = prettyPrint {
-        signature.receiverType?.let {
-            append(render(it, options.typeRendererOptions))
-            append('.')
-        }
-        signature.symbol.callableIdIfNonLocal?.callableName?.asString()?.let { append(it) }
-        if (signature is KtFunctionLikeSignature<*>) {
-            printCollection(signature.valueParameters, ", ", "(", ")") { parameter ->
-                append(parameter.name.asString())
-                append(": ")
-                append(render(parameter.returnType, options.typeRendererOptions))
-            }
-        }
-        append(": ")
-        append(render(signature.returnType, options.typeRendererOptions))
-    }
-
     override fun renderDeclaration(symbol: KtDeclarationSymbol, options: KtDeclarationRendererOptions): String {
         require(symbol is KtFirSymbol<*>)
         symbol.firSymbol.ensureResolved(FirResolvePhase.BODY_RESOLVE)