remove redundant plain object casts

Author: lobsterkatie

packages/node/src/eventbuilder.ts

@@ -57,7 +57,7 @@ export function eventFromUnknownInput(exception: unknown, hint?: EventHint): Eve
       const message = `Non-Error exception captured with keys: ${extractExceptionKeysForMessage(exception)}`;
 
       getCurrentHub().configureScope(scope => {
-        scope.setExtra('__serialized__', normalizeToSize(exception as Record<string, unknown>));
+        scope.setExtra('__serialized__', normalizeToSize(exception));
       });
 
       ex = (hint && hint.syntheticException) || new Error(message);

packages/utils/src/object.ts

@@ -196,11 +196,10 @@ export function extractExceptionKeysForMessage(exception: any, maxLength: number
  */
 export function dropUndefinedKeys<T>(val: T): T {
   if (isPlainObject(val)) {
-    const obj = val as { [key: string]: any };
     const rv: { [key: string]: any } = {};
-    for (const key of Object.keys(obj)) {
-      if (typeof obj[key] !== 'undefined') {
-        rv[key] = dropUndefinedKeys(obj[key]);
+    for (const key of Object.keys(val)) {
+      if (typeof val[key] !== 'undefined') {
+        rv[key] = dropUndefinedKeys(val[key]);
       }
     }
     return rv as T;