remove redundant Error casts

Author: lobsterkatie

packages/browser/src/eventbuilder.ts

@@ -228,9 +228,9 @@ export function eventFromUnknownInput(
 
     return event;
   }
-  if (isError(exception as Error)) {
+  if (isError(exception)) {
     // we have a real Error object, do nothing
-    return eventFromError(exception as Error);
+    return eventFromError(exception);
   }
   if (isPlainObject(exception) || isEvent(exception)) {
     // If it's a plain object or an instance of `Event` (the built-in JS kind, not this SDK's `Event` type), serialize

packages/integrations/src/extraerrordata.ts

@@ -105,7 +105,7 @@ export class ExtraErrorData implements Integration {
           continue;
         }
         const value = error[key];
-        extraErrorInfo[key] = isError(value) ? (value as Error).toString() : value;
+        extraErrorInfo[key] = isError(value) ? value.toString() : value;
       }
 
       // Check if someone attached `toJSON` method to grab even more properties (eg. axios is doing that)
@@ -114,7 +114,7 @@ export class ExtraErrorData implements Integration {
 
         for (const key of Object.keys(serializedError)) {
           const value = serializedError[key];
-          extraErrorInfo[key] = isError(value) ? (value as Error).toString() : value;
+          extraErrorInfo[key] = isError(value) ? value.toString() : value;
         }
       }