Some view to find out which jobs are in the queue to be executed

I wouldn't suggest removing those tables, no. The Oracle XE browser-based interface is written in APEX (Application Express, a framework for developing web-based apps in the Oracle database). If you break APEX, that interface will likely stop working.

As @Jeffrey pointed out, ALL_* view is not useful in your case. You should use DBA_* views because they show the records for all owners of the job objects.

The following sequence works just fine for me:

$ sqlplus /nolog

SQL> connect / as sysdba
Connected.

SQL> select distinct owner from dba_scheduler_job_run_details;

OWNER
------------------------------
EXFSYS
SPONGEBOB
SYS

SQL> create or replace view sys.jcaf as
  2  select * from dba_scheduler_job_run_details
  3  where owner = 'EXFSYS';    
View created.

SQL> grant select on sys.jcaf to spongebob;    
Grant succeeded.

SQL> create public synonym jcaf_v for sys.jcaf;    
Synonym created.

SQL> connect spongebob/passwd    
Connected.

SQL> select distinct owner from jcaf_v;

OWNER
------------------------------
EXFSYS