Kotlin 2: Accept a test change

For

    if(r != null) {
        val r2: Rectangle = r

in Kotlin 2 mode, there is no IMPLICIT_NOTNULL check in Kotlin 2 mode:

    then: BLOCK type=kotlin.Unit origin=null
      VAR name:r2 type:java.awt.Rectangle [val]
-       TYPE_OP type=java.awt.Rectangle origin=IMPLICIT_NOTNULL typeOperand=java.awt.Rectangle
-         GET_VAR 'val r: @[FlexibleNullability] java.awt.Rectangle? [val] declared in <root>.foo' type=@[FlexibleNullability] java.awt.Rectangle? origin=null
+       GET_VAR 'val r: @[FlexibleNullability] java.awt.Rectangle? [val] declared in <root>.foo' type=@[FlexibleNullability] java.awt.Rectangle? origin=null
      VAR name:height type:kotlin.Int [val]
        GET_FIELD 'FIELD IR_EXTERNAL_JAVA_DECLARATION_STUB name:height type:kotlin.Int visibility:public' type=kotlin.Int origin=null
          receiver: GET_VAR 'val r2: java.awt.Rectangle [val] declared in <root>.foo' type=java.awt.Rectangle origin=null

Author: igfoo

java/ql/test-kotlin2/library-tests/exprs/exprs.expected

@@ -1451,8 +1451,6 @@
 | exprs.kt:167:8:167:16 | ... (value not-equals) ... | exprs.kt:165:1:172:1 | foo | ValueNEExpr |
 | exprs.kt:167:13:167:16 | null | exprs.kt:165:1:172:1 | foo | NullLiteral |
 | exprs.kt:168:9:168:29 | r2 | exprs.kt:165:1:172:1 | foo | LocalVariableDeclExpr |
-| exprs.kt:168:29:168:29 | <implicit not null> | exprs.kt:165:1:172:1 | foo | ImplicitNotNullExpr |
-| exprs.kt:168:29:168:29 | Rectangle | exprs.kt:165:1:172:1 | foo | TypeAccess |
 | exprs.kt:168:29:168:29 | r | exprs.kt:165:1:172:1 | foo | VarAccess |
 | exprs.kt:169:9:169:30 | height | exprs.kt:165:1:172:1 | foo | LocalVariableDeclExpr |
 | exprs.kt:169:22:169:23 | r2 | exprs.kt:165:1:172:1 | foo | VarAccess |