[Test] Unmute passing codegen tests

compiler/testData/codegen/box/coroutines/kt38099.kt

@@ -1,5 +1,4 @@
 // TARGET_BACKEND: JVM
-// IGNORE_BACKEND: JVM
 // WITH_RUNTIME
 
 import kotlin.coroutines.*

compiler/testData/codegen/box/notNullAssertions/inFunctionWithExpressionBodyWithJavaGeneric.kt

@@ -1,7 +1,6 @@
 // !LANGUAGE: +StrictJavaNullabilityAssertions +ProhibitUsingNullableTypeParameterAgainstNotNullAnnotated
 // TARGET_BACKEND: JVM
 // IGNORE_BACKEND: JVM
-// IGNORE_BACKEND_FIR: JVM_IR
 // IGNORE_LIGHT_ANALYSIS
 
 // FILE: box.kt

compiler/testData/codegen/box/platformTypes/specializedMapFull.kt

@@ -1,5 +1,4 @@
 // TARGET_BACKEND: JVM
-// IGNORE_BACKEND_FIR: JVM_IR
 // MODULE: lib
 // FILE: AbstractSpecializedMap.java
 public abstract class AbstractSpecializedMap implements java.util.Map<Integer, Double> {

compiler/testData/codegen/box/platformTypes/specializedMapPut.kt

@@ -1,5 +1,4 @@
 // TARGET_BACKEND: JVM
-// IGNORE_BACKEND_FIR: JVM_IR
 // MODULE: lib
 // FILE: A.java
 import java.util.HashMap;