Rider static analysis (#433)

* Non-accessed local variable

* Merge cast and type checks.

* StringComparison.Ordinal added for better culture support

* Supposed code improvement in launcher. Remove unused code.

* Update ExplosionHelper.cs

Unintentional change.

* Optimized Import

* Add Robust.Shared.Utility import where it was deleted

* Other random suggestion

* Improve my comment

Content.Benchmarks/ComponentManagerGetAllComponents.cs

@@ -29,7 +29,7 @@ namespace Content.Benchmarks
             dummyReg.SetupGet(p => p.Type).Returns(typeof(DummyComponent));
             dummyReg.SetupGet(p => p.NetID).Returns((uint?) null);
             dummyReg.SetupGet(p => p.NetworkSynchronizeExistence).Returns(false);
-            dummyReg.SetupGet(p => p.References).Returns(new Type[] {typeof(DummyComponent)});
+            dummyReg.SetupGet(p => p.References).Returns(new [] {typeof(DummyComponent)});
 
             var componentFactory = new Mock<IComponentFactory>();
             componentFactory.Setup(p => p.GetComponent<DummyComponent>()).Returns(new DummyComponent());