Remove WITH_NEW_INFERENCE directive from all tests

This directive anyway does not make test run twice with OI, and with NI
It only once run the test with specific settings (// LANGUAGE)
and ignores irrelevant (OI or NI tags)

compiler/testData/diagnostics/testsWithStdLib/addAllProjection.kt

@@ -1,4 +1,3 @@
-// !WITH_NEW_INFERENCE
 
 fun test(mc: MutableCollection<out CharSequence>) {
     mc.addAll(<!TYPE_MISMATCH{NI}, TYPE_MISMATCH_DUE_TO_TYPE_PROJECTIONS{OI}!>mc<!>)