Remove default import "kotlin.reflect"

Basic reflection is usable without any imports (with :: literals)

This reverts commit 9503056dd5.

compiler/testData/diagnostics/testsWithStdLib/callableReference/function/renameOnImport.kt

@@ -12,6 +12,8 @@ fun A.baz(<!UNUSED_PARAMETER!>x<!>: String) {}
 
 // FILE: b.kt
 
+import kotlin.reflect.*
+
 import other.foo as foofoo
 import other.A as AA
 import other.baz as bazbaz