[Wasm] Remove unused WasmI1 type

compiler/ir/backend.wasm/src/org/jetbrains/kotlin/backend/wasm/ir2wasm/DeclarationGenerator.kt

@@ -357,7 +357,6 @@ class DeclarationGenerator(val context: WasmModuleCodegenContext) : IrElementVis
 
 fun generateDefaultInitializerForType(type: WasmType, g: WasmExpressionBuilder) = when (type) {
     WasmI32 -> g.buildConstI32(0)
-    WasmI1 -> g.buildConstI32(0)
     WasmI64 -> g.buildConstI64(0)
     WasmF32 -> g.buildConstF32(0f)
     WasmF64 -> g.buildConstF64(0.0)

wasm/wasm.ir/src/org/jetbrains/kotlin/wasm/ir/Types.kt

@@ -15,7 +15,6 @@ sealed class WasmType(
 // TODO: Remove this type.
 object WasmUnreachableType : WasmType("unreachable", -0x40)
 object WasmI32 : WasmType("i32", -0x1)
-object WasmI1 : WasmType("i32", -0x1)
 object WasmI64 : WasmType("i64", -0x2)
 object WasmF32 : WasmType("f32", -0x3)
 object WasmF64 : WasmType("f64", -0x4)