[FE] Drop ApproximateIntegerLiteralTypesInReceiverPosition language feature

This feature is not needed because it is unconditionally disabled for K1
  (because of not fully correct implementation) and unconditionally enabled
  in K2 (K2 does not support old behavior)

^KT-38895

compiler/testData/diagnostics/tests/evaluate/numberBinaryOperationsInfixCall.fir.kt

@@ -1,4 +1,3 @@
-// !LANGUAGE: -ApproximateIntegerLiteralTypesInReceiverPosition
 fun fooInt(p: Int) = p
 fun fooLong(p: Long) = p
 fun fooByte(p: Byte) = p