Front-end test data fixed to have no complex patterns

#KT-2359 In Progress

compiler/testData/diagnostics/tests/controlStructures/when.kt234.kt973.kt

@@ -6,14 +6,14 @@ package kt234_kt973
 
 fun test(t : #(Int, Int)) : Int {
     <!NO_ELSE_IN_WHEN!>when<!> (t) {
-        is #(10, 10) -> return 1
+        #(10, 10) -> return 1
     }
     return 0 // unreachable code
 }
 
 fun test1(t : #(Int, Int)) : Int {
     when (t) {
-        is #(10, 10) -> return 1
+        #(10, 10) -> return 1
         else -> return 2
     }
     <!UNREACHABLE_CODE!>return 0<!> // unreachable code
@@ -21,25 +21,11 @@ fun test1(t : #(Int, Int)) : Int {
 
 //more tests
 fun t1(x: Int) = when(x) {
-    is * -> 1
-}
-
-fun t2(x: Int) = when(x) {
-    is val a -> 1
-}
-
-fun t3(x: Int) = when (x) {
-    is * -> 1
-    <!UNREACHABLE_CODE!>2 -> 2<!>
-}
-
-fun t4(x: Int) = when (x) {
-    is val a -> 1
-    <!UNREACHABLE_CODE!>2 -> 2<!>
+    else -> 1
 }
 
 fun t5(x: Int) = <!NO_ELSE_IN_WHEN!>when<!> (x) {
-    is val a : Int -> 1
+    is Int -> 1
     2 -> 2
 }
 
@@ -50,5 +36,5 @@ fun foo3(x: Int) = when(x) {
 
 fun foo4(x: Int) = when(x) {
     2 -> x
-    is val a -> a
+    else -> 3
 }