Revert "Added AllowNullableArrayArgsInMain (1.4+) language setting"

#KT-35965 Fixed

compiler/frontend/src/org/jetbrains/kotlin/idea/MainFunctionDetector.kt

@@ -125,9 +125,7 @@ class MainFunctionDetector {
             if (typeArguments.size != 1) return false
 
             val typeArgument = typeArguments[0].type
-            if (!(languageVersionSettings.supportsFeature(LanguageFeature.AllowNullableArrayArgsInMain) &&
-                        KotlinBuiltIns.isStringOrNullableString(typeArgument) || KotlinBuiltIns.isString(typeArgument))
-            ) {
+            if (!KotlinBuiltIns.isString(typeArgument)) {
                 return false
             }
             if (typeArguments[0].projectionKind === Variance.IN_VARIANCE) {

compiler/util/src/org/jetbrains/kotlin/config/LanguageVersionSettings.kt

@@ -110,7 +110,6 @@ enum class LanguageFeature(
     MixedNamedArgumentsInTheirOwnPosition(KOTLIN_1_4),
     ProhibitTailrecOnVirtualMember(KOTLIN_1_4, kind = BUG_FIX),
     ProperComputationOrderOfTailrecDefaultParameters(KOTLIN_1_4),
-    AllowNullableArrayArgsInMain(KOTLIN_1_4),
     TrailingCommas(KOTLIN_1_4),
     ProhibitProtectedCallFromInline(KOTLIN_1_4, kind = BUG_FIX),
     ProperFinally(KOTLIN_1_4, kind = BUG_FIX),

idea/testData/run/MainInTest/module/src/mainNullableArgsInArray_after.kt

@@ -1,4 +1,3 @@
-// !LANGUAGE: +AllowNullableArrayArgsInMain
 
-fun main(args: Array<String?>) { // yes
+fun main(args: Array<String?>) { // no
 }

idea/testData/run/MainInTest/module/src/mainNullableArgsInArray_before.kt

@@ -1,4 +1,3 @@
-// !LANGUAGE: -AllowNullableArrayArgsInMain
 
 fun main(args: Array<String?>) { // no
 }

idea/testData/run/MainInTest/module/src/mainNullableArgsNullableArray_after.kt

@@ -1,4 +1,3 @@
-// !LANGUAGE: +AllowNullableArrayArgsInMain
 
-fun main(args: Array<String?>?) { // yes
+fun main(args: Array<String?>?) { // no
 }

idea/testData/run/MainInTest/module/src/mainNullableArgsNullableArray_before.kt

@@ -1,4 +1,3 @@
-// !LANGUAGE: -AllowNullableArrayArgsInMain
 
 fun main(args: Array<String?>?) { // no
 }