Cleanup: drop unnecessary sortedConservativelyBy

It's unnecessary because default `sortedBy` in Kotlin is already stable

GitOrigin-RevId: 98c9ca59fd51eee919bc30c797c5c050bbc55ca5

plugins/kotlin/base/util/src/org/jetbrains/kotlin/util/CollectionUtils.kt

@@ -50,15 +50,6 @@ fun <T> List<T>.takeWhileInclusive(predicate: (T) -> Boolean): List<T> {
     return slice(0..inclusiveIndex)
 }
 
-/**
- * Sorted by [selector] or preserves the order for elements where [selector] returns the same result
- */
-@ApiStatus.Internal
-fun <T, R : Comparable<R>> Sequence<T>.sortedConservativelyBy(selector: (T) -> R?): Sequence<T> =
-    withIndex()
-        .sortedWith(compareBy({ (_, value) -> selector(value) }, IndexedValue<T>::index))
-        .map(IndexedValue<T>::value)
-
 private fun <T> Sequence<T>.cycle(): Sequence<T> = sequence { while (true) yieldAll(this@cycle) }
 
 /**

plugins/kotlin/idea/src/org/jetbrains/kotlin/idea/quickfix/ReorderParametersFix.kt

@@ -23,7 +23,6 @@ import org.jetbrains.kotlin.idea.search.usagesSearch.descriptor
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.util.graph.DirectedGraph
 import org.jetbrains.kotlin.util.graph.sortTopologically
-import org.jetbrains.kotlin.util.sortedConservativelyBy
 
 class ReorderParametersFix(
     element: KtNamedFunction,
@@ -80,7 +79,9 @@ class ReorderParametersFix(
                 .associate { (topologicalIndex, parameterName) -> parameterName to topologicalIndex }
             val sortedParameters = parameters.asSequence()
                 .mapNotNull(KtParameter::getName)
-                .sortedConservativelyBy(parameterToTopologicalIndex::getValue)
+                // `sortedBy` is stable (It's written in the KDoc).
+                // It means that equal elements preserve their order relative to each other after sorting.
+                .sortedBy(parameterToTopologicalIndex::getValue)
                 .toList()
             if (sortedParameters.size != parameters.size) return null
             return ReorderParametersFix(function, sortedParameters)