chore: remove obsolete references to steem

browser-test/browser-test.js

src/renderers/default/StaticConfig.ts

src/renderers/default/_test/example1.mock.test.ts

src/renderers/default/embedder/HtmlDOMParser.spec.test.ts

src/renderers/default/embedder/HtmlDOMParser.ts

src/renderers/default/embedder/utils/AccountNameValidator.ts

src/renderers/default/embedder/utils/BadActorList.ts

src/renderers/default/embedder/utils/Links.ts

...enderers/default/sanitization/TagTransformingSanitizer.ts

src/security/Phishing.ts