[FIR] Remove unused declarations

compiler/fir/semantics/src/org/jetbrains/kotlin/fir/resolve/calls/ResolutionDiagnostic.kt

@@ -50,8 +50,7 @@ class NamedArgumentNotAllowed(
 
 class ArgumentPassedTwice(
     override val argument: FirExpression,
-    val valueParameter: FirValueParameter,
-    val firstOccurrence: ResolvedCallArgument
+    val valueParameter: FirValueParameter
 ) : InapplicableArgumentDiagnostic()
 
 class VarargArgumentOutsideParentheses(
@@ -72,9 +71,7 @@ class NameNotFound(
 ) : ResolutionDiagnostic(INAPPLICABLE_ARGUMENTS_MAPPING_ERROR)
 
 class NameForAmbiguousParameter(
-    val argument: FirNamedArgumentExpression,
-    val matchedParameter: FirValueParameter,
-    val anotherParameter: FirValueParameter
+    val argument: FirNamedArgumentExpression
 ) : ResolutionDiagnostic(INAPPLICABLE_ARGUMENTS_MAPPING_ERROR)
 
 object InapplicableCandidate : ResolutionDiagnostic(INAPPLICABLE)

compiler/fir/semantics/src/org/jetbrains/kotlin/fir/resolve/dfa/LogicSystem.kt

@@ -102,9 +102,6 @@ abstract class LogicSystem(private val context: ConeInferenceContext) {
         flow.assignmentIndex[variable] = index
     }
 
-    fun isSameValueIn(a: PersistentFlow, b: MutableFlow, variable: RealVariable): Boolean =
-        a.assignmentIndex[variable] == b.assignmentIndex[variable]
-
     fun isSameValueIn(a: PersistentFlow, b: PersistentFlow, variable: RealVariable): Boolean =
         a.assignmentIndex[variable] == b.assignmentIndex[variable]
 

compiler/fir/semantics/src/org/jetbrains/kotlin/fir/resolve/dfa/Stack.kt

@@ -22,7 +22,6 @@ fun <T> stackOf(vararg values: T): Stack<T> = StackImpl(*values)
 val Stack<*>.isEmpty: Boolean get() = size == 0
 val Stack<*>.isNotEmpty: Boolean get() = size != 0
 fun <T> Stack<T>.topOrNull(): T? = if (size == 0) null else top()
-fun <T> Stack<T>.popOrNull(): T? = if (size == 0) null else pop()
 
 private class StackImpl<T>(vararg values: T) : Stack<T>() {
     private val stack = mutableListOf(*values)