Remove directives that have no effect from bytecode text tests

All bytecode text tests are run with stdlib in the classpath and only
for JVM backend, therefore directives WITH_RUNTIME, TARGET_BACKEND,
IGNORE_BACKEND are not needed

compiler/testData/codegen/bytecodeText/kt7188.kt

@@ -1,6 +1,3 @@
-// WITH_RUNTIME
-// TARGET_BACKEND: JVM
-
 // FILE: Dummy.kt
 // Empty body to trigger multifile test mode