Drop undocumented absolute name specification feature with 'package.'

compiler/testData/diagnostics/tests/dataFlowInfoTraversal/smartcasts/SmartcastsForStableIdentifiers.kt

@@ -28,9 +28,6 @@ fun Any?.vars(<!UNUSED_PARAMETER!>a<!>: Any?) : Int {
     if (example.ns.y is Int) {
         <!UNUSED_VALUE!>b =<!> <!DEBUG_INFO_SMARTCAST!>example.ns.y<!>
     }
-//    if (package.bottles.ns.y is Int) {
-//        b = ns.y
-//    }
     if (Obj.y is Int) {
         <!UNUSED_VALUE!>b =<!> <!DEBUG_INFO_SMARTCAST!>Obj.y<!>
     }
@@ -86,4 +83,4 @@ open class C {
           <!UNUSED_VALUE!>t =<!> <!DEBUG_INFO_SMARTCAST!>this@C<!>
        }
     }
-}
+}

compiler/testData/psi/When.txt

@@ -359,7 +359,8 @@ JetFile: When.kt
             TYPE_REFERENCE
               USER_TYPE
                 USER_TYPE
-                  PsiElement(package)('package')
+                  PsiErrorElement:Expecting an element
+                    PsiElement(package)('package')
                   PsiElement(DOT)('.')
                   REFERENCE_EXPRESSION
                     PsiElement(IDENTIFIER)('a')

compiler/testData/psi/greatSyntacticShift/functionTypes.txt

@@ -74,7 +74,8 @@ JetFile: functionTypes.kt
         PsiWhiteSpace(' ')
         TYPE_REFERENCE
           USER_TYPE
-            PsiElement(package)('package')
+            PsiErrorElement:Expecting an element
+              PsiElement(package)('package')
             PsiElement(DOT)('.')
             REFERENCE_EXPRESSION
               PsiElement(IDENTIFIER)('Int')

compiler/testData/psi/recovery/IncompleteTypeRefWithPackageKeyword.txt

@@ -22,7 +22,8 @@ JetFile: IncompleteTypeRefWithPackageKeyword.kt
         PsiWhiteSpace(' ')
         TYPE_REFERENCE
           USER_TYPE
-            PsiElement(package)('package')
+            PsiErrorElement:Expecting an element
+              PsiElement(package)('package')
             PsiErrorElement:Expecting '.'
               <empty list>
       PsiWhiteSpace('\n')