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/tests/callableReference/function/extensionToSupertype.kt

@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !WITH_NEW_INFERENCE
 // !CHECK_TYPE
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 

compiler/testData/diagnostics/tests/callableReference/function/lhsNotAClass.fir.kt

@@ -1,4 +1,3 @@
-// !WITH_NEW_INFERENCE
 
 class A<T, U : Any> {
     fun foo() = <!CALLABLE_REFERENCE_LHS_NOT_A_CLASS!>T::toString<!>

compiler/testData/diagnostics/tests/callableReference/function/lhsNotAClass.kt

@@ -1,4 +1,3 @@
-// !WITH_NEW_INFERENCE
 
 class A<T, U : Any> {
     fun foo() = <!CALLABLE_REFERENCE_LHS_NOT_A_CLASS!>T::<!UNRESOLVED_REFERENCE!>toString<!><!>

compiler/testData/diagnostics/tests/callableReference/function/unresolved.fir.kt

@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_EXPRESSION, -UNUSED_PARAMETER
-// !WITH_NEW_INFERENCE
 
 class A
 

compiler/testData/diagnostics/tests/callableReference/function/unresolved.kt

@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_EXPRESSION, -UNUSED_PARAMETER
-// !WITH_NEW_INFERENCE
 
 class A