Perf test: remove info markers in testdata before test

idea/performanceTests/test/org/jetbrains/kotlin/idea/perf/AbstractPerformanceHighlightingTest.kt

@@ -12,6 +12,7 @@ import com.intellij.testFramework.fixtures.impl.CodeInsightTestFixtureImpl.ensur
 import com.intellij.util.ThrowableRunnable
 import org.jetbrains.kotlin.idea.KotlinFileType
 import org.jetbrains.kotlin.idea.perf.Stats.Companion.WARM_UP
+import org.jetbrains.kotlin.idea.perf.util.removeInfoMarkers
 import org.jetbrains.kotlin.idea.test.KotlinLightCodeInsightFixtureTestCase
 import org.jetbrains.kotlin.idea.testFramework.commitAllDocuments
 
@@ -62,6 +63,7 @@ abstract class AbstractPerformanceHighlightingTest : KotlinLightCodeInsightFixtu
 
             val project = myFixture.project
             commitAllDocuments()
+            removeInfoMarkers()
 
             val file = myFixture.file
             val offset = file.textOffset

idea/performanceTests/test/org/jetbrains/kotlin/idea/perf/util/highlighting.kt

@@ -0,0 +1,19 @@
+/*
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.idea.perf.util
+
+import com.intellij.psi.PsiDocumentManager
+import com.intellij.testFramework.EdtTestUtil
+import com.intellij.testFramework.ExpectedHighlightingData
+import org.jetbrains.kotlin.idea.test.KotlinLightCodeInsightFixtureTestCase
+
+fun KotlinLightCodeInsightFixtureTestCase.removeInfoMarkers() {
+    ExpectedHighlightingData(editor.document, true, true).init()
+
+    EdtTestUtil.runInEdtAndWait {
+        PsiDocumentManager.getInstance(project).commitAllDocuments()
+    }
+}