Delete RCTJSInvokerModule protocol

Summary:
This protocol is no longer necessary, because we introduced the bridgeless-compatible abstraction: RCTCallJSModuleMethod.

Changelog: [iOS][Removed] - Delete RCTCallJSModuleMethod protocol

Reviewed By: fkgozali

Differential Revision: D28395446

fbshipit-source-id: 0ad606ce7935b24bfbd6e0c2f35fbde480a8a6ff

Author: RSNara