Delete TargetPlatform.builtins

Replace it's usages with relevant singleton reference

compiler/frontend.java/src/org/jetbrains/kotlin/resolve/jvm/platform/JvmPlatform.kt

@@ -16,7 +16,6 @@
 
 package org.jetbrains.kotlin.resolve.jvm.platform
 
-import org.jetbrains.kotlin.builtins.KotlinBuiltIns
 import org.jetbrains.kotlin.descriptors.ModuleParameters
 import org.jetbrains.kotlin.platform.JavaToKotlinClassMap
 import org.jetbrains.kotlin.platform.JvmBuiltIns
@@ -37,9 +36,6 @@ object JvmPlatform : TargetPlatform("JVM") {
             get() = DEFAULT_IMPORTS_FOR_JVM
     }
 
-    override val builtIns: KotlinBuiltIns
-        get() = JvmBuiltIns.Instance
-
     override val platformConfigurator: PlatformConfigurator = JvmPlatformConfigurator
 }
 
@@ -60,7 +56,7 @@ private val DEFAULT_IMPORTS_FOR_JVM: List<ImportPath> = ArrayList<ImportPath>().
         }
     }
 
-    val builtIns = JvmPlatform.builtIns
+    val builtIns = JvmBuiltIns.Instance
     for (builtinPackageFragment in builtIns.builtInsPackageFragments) {
         addAllClassifiersFromScope(builtinPackageFragment.getMemberScope())
     }