Refactor: remove empty overrides in K2 checkers

compiler/fir/checkers/checkers.wasm/src/org/jetbrains/kotlin/fir/analysis/wasm/checkers/WasmDeclarationCheckers.kt

@@ -9,20 +9,8 @@ import org.jetbrains.kotlin.fir.analysis.checkers.declaration.*
 import org.jetbrains.kotlin.fir.analysis.wasm.checkers.declaration.*
 
 object WasmDeclarationCheckers : DeclarationCheckers() {
-    override val functionCheckers: Set<FirFunctionChecker>
-        get() = setOf(
-        )
-
-    override val basicDeclarationCheckers: Set<FirBasicDeclarationChecker>
-        get() = setOf(
-        )
-
     override val classCheckers: Set<FirClassChecker>
         get() = setOf(
-            FirWasmExternalInheritanceChecker
-        )
-
-    override val simpleFunctionCheckers: Set<FirSimpleFunctionChecker>
-        get() = setOf(
+            FirWasmExternalInheritanceChecker,
         )
 }

compiler/fir/checkers/checkers.wasm/src/org/jetbrains/kotlin/fir/analysis/wasm/checkers/WasmExpressionCheckers.kt

@@ -8,19 +8,4 @@ package org.jetbrains.kotlin.fir.analysis.wasm.checkers
 import org.jetbrains.kotlin.fir.analysis.checkers.expression.*
 
 object WasmExpressionCheckers : ExpressionCheckers() {
-    override val annotationCallCheckers: Set<FirAnnotationCallChecker>
-        get() = setOf(
-        )
-
-    override val basicExpressionCheckers: Set<FirBasicExpressionChecker>
-        get() = setOf(
-        )
-
-    override val functionCallCheckers: Set<FirFunctionCallChecker>
-        get() = setOf(
-        )
-
-    override val callCheckers: Set<FirCallChecker>
-        get() = setOf(
-        )
 }