Remove hardcoded reference to SymbolIndexer in asm

kmath-ast/src/jvmMain/kotlin/space/kscience/kmath/asm/internal/PrimitiveAsmBuilder.kt

@@ -372,12 +372,12 @@ internal sealed class PrimitiveAsmBuilder<T : Number, out E : Expression<T>>(
         /**
          * ASM type for [java.lang.Number].
          */
-        val NUMBER_TYPE: Type = getObjectType("java/lang/Number")
+        val NUMBER_TYPE: Type = getType(Number::class.java)
 
         /**
          * ASM type for [SymbolIndexer].
          */
-        val SYMBOL_INDEXER_TYPE: Type = getObjectType("space/kscience/kmath/expressions/SymbolIndexer")
+        val SYMBOL_INDEXER_TYPE: Type = getType(SymbolIndexer::class.java)
     }
 }
 

kmath-core/src/commonMain/kotlin/space/kscience/kmath/expressions/SymbolIndexer.kt

@@ -14,8 +14,6 @@ import kotlin.contracts.InvocationKind
 import kotlin.contracts.contract
 import kotlin.jvm.JvmInline
 
-//DO NOT MOVE THIS CLASS if you do not want ASM module to break
-
 /**
  * An environment to easy transform indexed variables to symbols and back.
  * TODO requires multi-receivers to be beautiful