Bug 1856795 - Remove redundant member init r=emilio

Done with:
./mach static-analysis check --checks="-*, readability-redundant-member-init" --fix .

https://clang.llvm.org/extra/clang-tidy/checks/readability/redundant-member-init.html

Differential Revision: https://phabricator.services.mozilla.com/D190002

dom/script/ScriptLoader.cpp

@@ -1918,7 +1918,7 @@ using ModuleCompileTask =
 class ScriptDecodeTask final : public CompileOrDecodeTask {
  public:
   explicit ScriptDecodeTask(const JS::TranscodeRange& aRange)
-      : CompileOrDecodeTask(), mRange(aRange) {}
+      : mRange(aRange) {}
 
   nsresult Init(JS::DecodeOptions& aOptions) {
     nsresult rv = InitFrontendContext();