[FIR] Remove links to spec sentences during comparison fir and old front-end test data

compiler/testData/diagnostics/tests/when/When.fir.kt

@@ -1,4 +1,5 @@
 // !WITH_NEW_INFERENCE
+
 fun Int.foo() : Boolean = true
 
 fun foo() : Int {

compiler/testData/diagnostics/tests/when/kt10439.fir.kt

@@ -1,4 +1,5 @@
 // !WITH_NEW_INFERENCE
+
 fun foo(x: Int) = x
 
 fun test0(flag: Boolean) {

compiler/testData/diagnostics/tests/when/kt9972.fir.kt

@@ -1,4 +1,5 @@
 // !WITH_NEW_INFERENCE
+
 fun test1(): Int {
     val x: String = if (true) {
         when {

compiler/testData/diagnostics/tests/when/whenAndLambdaWithExpectedType.fir.kt

@@ -1,4 +1,5 @@
 // !WITH_NEW_INFERENCE
+
 val test1: (String) -> Boolean =
         when {
             true -> {{ true }}

compiler/testData/diagnostics/tests/when/whenWithNothingAndLambdas.fir.kt

@@ -1,5 +1,6 @@
 // !WITH_NEW_INFERENCE
 // NI_EXPECTED_FILE
+
 val test1 = when {
     true -> { { true } }
     else -> TODO()