[Graph] improve emoji removal function #2451

Job	Run time
get-cypress-tests	4s
cypress-run (cypress/e2e/sourcesTable/sourcesTable.cy.ts)	6m 27s
cypress-run (cypress/e2e/trendingTopics/trendingTopics.cy.ts)	8m 5s
cypress-run (cypress/e2e/curationTable/curation.cy.ts)	6m 32s
cypress-run (cypress/e2e/addContent/addSource.cy.ts)	6m 16s
cypress-run (cypress/e2e/addContent/addTweet.cy.ts)	8m 6s
cypress-run (cypress/e2e/addContent/addWebpage.cy.ts)	7m 45s
cypress-run (cypress/e2e/addContent/addYoutube.cy.ts)	7m 45s
cypress-run (cypress/e2e/seeLatest/latest.cy.ts)	8m 37s
cypress-run (cypress/e2e/checkEnv.cy.ts)	6m 41s
cypress-run (cypress/e2e/addNode/addNodeType.cy.ts)	7m 18s
cypress-run (cypress/e2e/admin/topics.cy.ts)	6m 55s
cypress-run (cypress/e2e/admin/signin.cy.ts)	7m 54s
	1h 28m 25s

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