Remove unused enum wasmBlockType

Change-Id: I539c771195a5c9a5242c9650815496f8c255cdba
Reviewed-on: https://chrome-internal-review.googlesource.com/c/v8/fuzzilli/+/9064096
Commit-Queue: Doga Yüksel <dyuksel@google.com>
Auto-Submit: Danylo Mocherniuk <mdanylo@google.com>
Reviewed-by: Doga Yüksel <dyuksel@google.com>

Author: danylo1999

Sources/Fuzzilli/Base/ProgramBuilder.swift

@@ -3922,11 +3922,6 @@ public class ProgramBuilder {
             b.emit(WasmReassign(), withInputs: [variable, to])
         }
 
-        public enum wasmBlockType {
-            case typeIdx(Int)
-            case valueType(ILType)
-        }
-
         // The first innerOutput of this block is a label variable, which is just there to explicitly mark control-flow and allow branches.
         public func wasmBuildBlock(with signature: WasmSignature, args: [Variable], body: (Variable, [Variable]) -> ()) {
             assert(signature.outputTypes.count == 0)