Remove explicit locking in OpenIdConnectCachingSecurityTokenProvider#3202

jmprieur merged 2 commits intomasterAzureAD/microsoft-identity-web:masterfrom

kecaruso/OpenIdConnectCachingSecurityTokenProvider-lockingAzureAD/microsoft-identity-web:kecaruso/OpenIdConnectCachingSecurityTokenProvider-lockingCopy head branch name to clipboard