Build: remove obsolete compiler arguments

These compiler arguments enable features which are enabled by default in
the current Kotlin anyway.

The only exception is in :compiler:cli which uses an old language
version.

gradle.properties

@@ -7,9 +7,6 @@ org.gradle.java.installations.fromEnv=JDK_16,JDK_17,JDK_18,JDK_9,JDK_10,JDK_11,J
 cacheRedirectorEnabled=true
 defaultSnapshotVersion=1.5.255-SNAPSHOT
 
-kotlin.compiler.effectSystemEnabled=true
-kotlin.compiler.newInferenceEnabled=true
-
 # Enable JVM IR backend for kotlin-stdlib, kotlin-reflect, kotlin-test.
 #kotlin.build.useIRForLibraries=true