Revert "Don't stop constraints processing if all type variables have proper equality constraints"

This reverts commit b87c2a15

compiler/testData/diagnostics/tests/inference/violatingUpperBoundForSelfType.kt

@@ -5,5 +5,5 @@ fun <E : Enum<E>> createMap(enumClass: Class<E>) {}
 
 fun reproduce() {
     val enumClass: Class<Enum<*>> = "any" as Class<Enum<*>>
-    createMap(<!TYPE_MISMATCH, TYPE_MISMATCH!>enumClass<!>)
+    createMap(enumClass)
 }