[test] Remove redundant signature clash diagnotic test from Native tests

Since d8d8f24f62 the tests for this
diagnostic are run with the Compiler Core test infrastructure
(see `compiler/testData/diagnostics/klibSerializationTests`)
There is no need to test it separately in `FirCompilerOutputTest`.

^KT-64393 Fixed

native/native.tests/testData/compilerOutput/SignatureClashDiagnostics/lib.kt

@@ -1,3 +0,0 @@
-package com.example.klib.serialization.diagnostics
-
-fun movedToLib() {}

native/native.tests/testData/compilerOutput/SignatureClashDiagnostics/main.kt

@@ -1,25 +0,0 @@
-package com.example.klib.serialization.diagnostics
-
-class A {
-    @Deprecated("", level = DeprecationLevel.HIDDEN)
-    fun foo(): String = ""
-
-    fun foo(): Int = 0
-}
-
-var myVal: Long = 0L
-
-@Deprecated("This function moved to the 'lib' module", level = DeprecationLevel.HIDDEN)
-fun movedToLib() {}
-
-@Deprecated("", level = DeprecationLevel.HIDDEN)
-var myVal: Int = 0
-
-@Deprecated("", level = DeprecationLevel.HIDDEN)
-val myVal: String
-    get() = ""
-
-fun main() {
-    println(A().foo())
-    movedToLib()
-}

native/native.tests/testData/compilerOutput/SignatureClashDiagnostics/output.txt

@@ -1,47 +0,0 @@
-native/native.tests/testData/compilerOutput/SignatureClashDiagnostics/main.kt:4:5: error: platform declaration clash: The following functions have the same IR signature (com.example.klib.serialization.diagnostics/A.foo|foo(){}[0]):
-    fun foo(): kotlin.String defined in com.example.klib.serialization.diagnostics.A
-    fun foo(): kotlin.Int defined in com.example.klib.serialization.diagnostics.A
-    @Deprecated("", level = DeprecationLevel.HIDDEN)
-    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-native/native.tests/testData/compilerOutput/SignatureClashDiagnostics/main.kt:7:5: error: platform declaration clash: The following functions have the same IR signature (com.example.klib.serialization.diagnostics/A.foo|foo(){}[0]):
-    fun foo(): kotlin.String defined in com.example.klib.serialization.diagnostics.A
-    fun foo(): kotlin.Int defined in com.example.klib.serialization.diagnostics.A
-    fun foo(): Int = 0
-    ^^^^^^^^^^^^^^^^^^
-native/native.tests/testData/compilerOutput/SignatureClashDiagnostics/main.kt:10:1: error: platform declaration clash: The following properties have the same IR signature (com.example.klib.serialization.diagnostics/myVal|{}myVal[0]):
-    val myVal: kotlin.String defined in com.example.klib.serialization.diagnostics
-    var myVal: kotlin.Int defined in com.example.klib.serialization.diagnostics
-    var myVal: kotlin.Long defined in com.example.klib.serialization.diagnostics
-var myVal: Long = 0L
-^^^^^^^^^^^^^^^^^^^^
-native/native.tests/testData/compilerOutput/SignatureClashDiagnostics/main.kt:10:1: error: platform declaration clash: The following functions have the same IR signature (com.example.klib.serialization.diagnostics/myVal.<get-myVal>|<get-myVal>(){}[0]):
-    fun `<get-myVal>`(): kotlin.Int defined in com.example.klib.serialization.diagnostics
-    fun `<get-myVal>`(): kotlin.Long defined in com.example.klib.serialization.diagnostics
-    fun `<get-myVal>`(): kotlin.String defined in com.example.klib.serialization.diagnostics
-var myVal: Long = 0L
-^^^^^^^^^^^^^^^^^^^^
-native/native.tests/testData/compilerOutput/SignatureClashDiagnostics/main.kt:15:1: error: platform declaration clash: The following properties have the same IR signature (com.example.klib.serialization.diagnostics/myVal|{}myVal[0]):
-    val myVal: kotlin.String defined in com.example.klib.serialization.diagnostics
-    var myVal: kotlin.Int defined in com.example.klib.serialization.diagnostics
-    var myVal: kotlin.Long defined in com.example.klib.serialization.diagnostics
-@Deprecated("", level = DeprecationLevel.HIDDEN)
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-native/native.tests/testData/compilerOutput/SignatureClashDiagnostics/main.kt:15:1: error: platform declaration clash: The following functions have the same IR signature (com.example.klib.serialization.diagnostics/myVal.<get-myVal>|<get-myVal>(){}[0]):
-    fun `<get-myVal>`(): kotlin.Int defined in com.example.klib.serialization.diagnostics
-    fun `<get-myVal>`(): kotlin.Long defined in com.example.klib.serialization.diagnostics
-    fun `<get-myVal>`(): kotlin.String defined in com.example.klib.serialization.diagnostics
-@Deprecated("", level = DeprecationLevel.HIDDEN)
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-native/native.tests/testData/compilerOutput/SignatureClashDiagnostics/main.kt:18:1: error: platform declaration clash: The following properties have the same IR signature (com.example.klib.serialization.diagnostics/myVal|{}myVal[0]):
-    val myVal: kotlin.String defined in com.example.klib.serialization.diagnostics
-    var myVal: kotlin.Int defined in com.example.klib.serialization.diagnostics
-    var myVal: kotlin.Long defined in com.example.klib.serialization.diagnostics
-@Deprecated("", level = DeprecationLevel.HIDDEN)
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-native/native.tests/testData/compilerOutput/SignatureClashDiagnostics/main.kt:20:5: error: platform declaration clash: The following functions have the same IR signature (com.example.klib.serialization.diagnostics/myVal.<get-myVal>|<get-myVal>(){}[0]):
-    fun `<get-myVal>`(): kotlin.Int defined in com.example.klib.serialization.diagnostics
-    fun `<get-myVal>`(): kotlin.Long defined in com.example.klib.serialization.diagnostics
-    fun `<get-myVal>`(): kotlin.String defined in com.example.klib.serialization.diagnostics
-    get() = ""
-    ^^^^^^^^^^
-COMPILATION_ERROR

native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/CompilerOutputTest.kt

@@ -164,25 +164,14 @@ abstract class CompilerOutputTestBase : AbstractNativeSimpleTest() {
     }
 }
 
+@Suppress("JUnitTestCaseWithNoTests")
 @TestDataPath("\$PROJECT_ROOT")
 @EnforcedProperty(ClassLevelProperty.COMPILER_OUTPUT_INTERCEPTOR, "NONE")
 class ClassicCompilerOutputTest : CompilerOutputTestBase()
 
+@Suppress("JUnitTestCaseWithNoTests")
 @FirPipeline
 @Tag("frontend-fir")
 @TestDataPath("\$PROJECT_ROOT")
 @EnforcedProperty(ClassLevelProperty.COMPILER_OUTPUT_INTERCEPTOR, "NONE")
-class FirCompilerOutputTest : CompilerOutputTestBase() {
+class FirCompilerOutputTest : CompilerOutputTestBase()
-
-    @Test
-    fun testSignatureClashDiagnostics() {
-        // TODO: use the Compiler Core test infrastructure for testing these diagnostics (KT-64393)
-        val rootDir = File("native/native.tests/testData/compilerOutput/SignatureClashDiagnostics")
-        val settings = testRunSettings
-        val lib = compileLibrary(settings, rootDir.resolve("lib.kt")).assertSuccess().resultingArtifact
-        val compilationResult = compileLibrary(settings, rootDir.resolve("main.kt"), dependencies = listOf(lib))
-        val goldenData = rootDir.resolve("output.txt")
-
-        KotlinTestUtils.assertEqualsToFile(goldenData, compilationResult.toOutput())
-    }
-}