KT-627 Drop Predicate expression

compiler/testData/diagnostics/tests/QualifiedExpressions.jet

@@ -7,7 +7,7 @@ fun test(s: String?) {
    val <!UNUSED_VARIABLE!>d<!>: Int = s?.length ?: <!TYPE_MISMATCH!>"empty"<!>
    val e: String = <!TYPE_MISMATCH!>s?.length<!> ?: "empty"
    val <!UNUSED_VARIABLE!>f<!>: Int = s?.length ?: b ?: 1
-   val <!UNUSED_VARIABLE!>g<!>: Int? = e? startsWith("s")?.length
+   val <!UNUSED_VARIABLE!>g<!>: Boolean? = e.startsWith("s")//?.length
 }
 
 fun String.startsWith(<!UNUSED_PARAMETER!>s<!>: String): Boolean = true

compiler/testData/psi/PredicateExpression.jet

@@ -1,3 +0,0 @@
-fun foo() {
-  a?f.foo
-}

compiler/testData/psi/PredicateExpression.txt

@@ -1,26 +0,0 @@
-JetFile: PredicateExpression.jet
-  NAMESPACE_HEADER
-    <empty list>
-  FUN
-    PsiElement(fun)('fun')
-    PsiWhiteSpace(' ')
-    PsiElement(IDENTIFIER)('foo')
-    VALUE_PARAMETER_LIST
-      PsiElement(LPAR)('(')
-      PsiElement(RPAR)(')')
-    PsiWhiteSpace(' ')
-    BLOCK
-      PsiElement(LBRACE)('{')
-      PsiWhiteSpace('\n  ')
-      DOT_QUALIFIED_EXPRESSION
-        PREDICATE_EXPRESSION
-          REFERENCE_EXPRESSION
-            PsiElement(IDENTIFIER)('a')
-          PsiElement(QUEST)('?')
-          REFERENCE_EXPRESSION
-            PsiElement(IDENTIFIER)('f')
-        PsiElement(DOT)('.')
-        REFERENCE_EXPRESSION
-          PsiElement(IDENTIFIER)('foo')
-      PsiWhiteSpace('\n')
-      PsiElement(RBRACE)('}')