[FIR] Remove equality by fir from symbols

compiler/fir/tree/src/org/jetbrains/kotlin/fir/symbols/impl/FirClassLikeSymbol.kt

@@ -15,11 +15,6 @@ sealed class FirClassLikeSymbol<D>(
     val classId: ClassId
 ) : FirClassifierSymbol<D>() where D : FirClassLikeDeclaration<D>, D : FirSymbolOwner<D> {
     abstract override fun toLookupTag(): ConeClassLikeLookupTag
-
-    override fun equals(other: Any?): Boolean =
-        other is FirClassLikeSymbol<*> && fir == other.fir
-
-    override fun hashCode(): Int = fir.hashCode()
 }
 
 sealed class FirClassSymbol<C : FirClass<C>>(classId: ClassId) : FirClassLikeSymbol<C>(classId) {

compiler/fir/tree/src/org/jetbrains/kotlin/fir/symbols/impl/FirTypeParameterSymbol.kt

@@ -17,13 +17,5 @@ class FirTypeParameterSymbol : FirClassifierSymbol<FirTypeParameter>() {
     private val lookupTag = ConeTypeParameterLookupTag(this)
 
     override fun toLookupTag(): ConeTypeParameterLookupTag = lookupTag
-
-    override fun equals(other: Any?): Boolean {
-        return other is FirTypeParameterSymbol && fir == other.fir
-    }
-
-    override fun hashCode(): Int {
-        return fir.hashCode()
-    }
 }