Merge pull request #10950 from ethereum/removeChecks

[SolYul] Remove (hopefully) unnecessary checks.

test/libsolidity/semanticTests/structs/event.sol

@@ -0,0 +1,17 @@
+pragma abicoder v2;
+
+struct Item {uint x;}
+library L {
+    event Ev(Item);
+    function o() public { emit L.Ev(Item(1)); }
+}
+contract C {
+    function f() public {
+        L.o();
+    }
+}
+// ====
+// compileViaYul: also
+// ----
+// library: L
+// f() ->