remove dsn

.js.env.example

@@ -89,4 +89,4 @@ export MM_ENABLE_SETTINGS_PAGE_DEV_OPTIONS="true"
 
 # The endpoint used to submit errors and tracing data to Sentry.
 # The below is the `test-metamask` project.
-# export MM_SENTRY_DSN_DEV=https://f59f3dd640d2429d9d0e2445a87ea8e1@sentry.io/273496
+# export MM_SENTRY_DSN_DEV=